[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
** Tags added: cscc -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USE
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Sorry for the belated response. In this case, I think kernel parameter "acpi_mask_gpe=0x13" to disable it is the only workaround. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
I dont't believe my laptop has a free fall sensor, didn't ever hear of such a thing. How do I check? It does have ExpressCache though. My vague hypothesis is that it has something to do with the ODD but i don't understand enough of this for being able to verify any of this without instructions. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Does this laptop have a free fall sensor?
Seems like gpe13 tries to notify your SATA controller something. Or
maybe it's related to the ExpressCache?
Scope (_GPE)
{
Method (_L13, 0, NotSerialized) // _Lxx: Level-Triggered GPE
{
If ((PFLV == FDTP))
{
Return (Zero)
}
GPE3 = Zero
GL08 |= 0x10
Notify (\_SB.PCI0.SAT0, 0x82) // Device-Specific Change
Return (Zero)
}
}
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1087010
Title:
kworker uses 70-90% of a CPU core (hyperthreaded)
Status in linux package in Ubuntu:
Triaged
Bug description:
I see high (70-90%) cpu usage from a kworker thread. Usually
kworker/0:1 or kworker/0:2. This does not always happen. On some boots
all is fine but once it shows, rebooting does not make it go away.
WORKAROUND: Execute:
echo "disable" > /sys/firmware/acpi/interrupts/gpe13
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-19-generic 3.5.0-19.30
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC0: mio1965 F pulseaudio
/dev/snd/pcmC0D0p: mio1965 F...m pulseaudio
Date: Wed Dec 5 22:37:00 2012
HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11
InstallationDate: Installed on 2012-10-10 (55 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64
(20120823.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic
root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro
crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1
i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1
snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash
vt.handoff=7
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory
/home/mio not ours.
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.5.0-19-generic N/A
linux-backports-modules-3.5.0-19-generic N/A
linux-firmware1.95
SourcePackage: linux
UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago)
dmi.bios.date: 08/02/2012
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: P04AAE
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: SAMSUNG_NP1234567890
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
dmi.product.name: 700Z7C
dmi.product.version: 0.1
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
---
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC0: mio1568 F pulseaudio
CurrentDesktop: Unity:Unity7:ubuntu
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb
InstallationDate: Installed on 2018-05-09 (9 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic
root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d
nouveau.runpm=0 vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
RelatedPackageVersions:
linux-restricted-modules-4.15.0-20-generic N/A
linux-backports-modules-4.15.0-20-generic N/A
linux-firmware 1.173
Tags: bionic
Uname: Linux 4.15.0-20-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/02/2012
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: P04AAE
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: SAMSUNG_NP1234567890
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
** Attachment added: "acpidump.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/5143923/+files/acpidump.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendo
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Can you attach acpidump? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse:
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
** Tags removed: kernel-bug-exists-upstream-4.17-rc4 needs-filing-upstream ** Tags added: kernel-bug-exists-upstream-4.17-rc6 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELEC
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
I can confirm that the issue is present with 4.17-rc6 too -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architect
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Ok I just saw it's a GPE issue. Can you try latest mainline kernel [1]? There are several GPE/EC fixes. [1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc6/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.ver
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
`perf top` output on 4.15.0-20-generic 13,09% [kernel][k] acpi_os_read_port 11,81% [kernel][k] acpi_ns_search_one_scope 6,42% [kernel][k] acpi_os_write_port 4,62% [kernel][k] acpi_ut_track_stack_ptr 4,17% [kernel][k] acpi_ut_trace_ptr 3,42% [kernel][k] strncpy 3,28% [kernel][k] __tick_nohz_idle_enter 2,49% [kernel][k] acpi_ut_status_exit 1,63% [kernel][k] acpi_ex_resolve_node_to_value 1,50% [kernel][k] nmi 1,34% libapt-pkg.so.5.0.2 [.] lroundf@plt 1,31% [kernel][k] acpi_ut_update_ref_count.part.1 1,28% [kernel][k] acpi_ex_resolve_operands 1,25% [kernel][k] acpi_ut_add_reference 1,23% [kernel][k] acpi_ut_acquire_mutex 1,19% libapt-pkg.so.5.0.2 [.] _ZNK8pkgCache11DepIterator10IsNegativeEv 1,18% [kernel][k] acpi_ns_evaluate 1,12% [kernel][k] acpi_ut_trace 1,00% libstdc++.so.6.0.25 [.] _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_createERmm 0,97% [kernel][k] _find_next_bit 0,92% [kernel][k] kmem_cache_alloc 0,82% [kernel][k] rcu_note_context_switch 0,71% [kernel][k] menu_select 0,67% [kernel][k] __kmalloc 0,64% [kernel][k] acpi_ut_valid_internal_object 0,62% [kernel][k] acpi_ut_update_object_reference 0,57% [kernel][k] kfree 0,57% libapt-pkg.so.5.0.2 [.] _Z13stringcasecmpN9__gnu_cxx17__normal_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcES9_S2_S2_ 0,51% libapt-pkg.so.5.0.2 [.] _ZN6FileFd5WriteEPKvy 0,49% [kernel][k] kmem_cache_free 0,48% [kernel][k] acpi_ns_lookup 0,48% python3.6 [.] 0x00184852 0,47% [kernel][k] acpi_hw_validate_io_request 0,45% [kernel][k] acpi_ut_match_predefined_method 0,42% [kernel][k] prefetch_freepointer 0,39% [kernel][k] acpi_ps_get_next_arg 0,39% [kernel][k] acpi_ut_get_next_predefined_method 0,35% [kernel][k] acpi_ds_exec_begin_op 0,35% [kernel][k] acpi_ps_create_op 0,33% [kernel][k] acpi_ps_get_opcode_info 0,33% [kernel][k] acpi_ps_parse_loop 0,32% [kernel][k] acpi_ut_repair_name 0,31% [kernel][k] acpi_ex_read_data_from_field 0,31% [kernel][k] acpi_ns_build_normalized_path 0,30% [kernel][k] acpi_ds_delete_result_if_not_used 0,30% [kernel][k] acpi_ds_create_operand 0,28% [kernel][k] acpi_ds_exec_end_op 0,28% [kernel][k] __schedule 0,27% [kernel][k] acpi_ds_evaluate_name_path 0,26% libc-2.27.so[.] __GI___strlen_sse2 0,26% [kernel][k] acpi_ex_name_segment 0,25% [kernel][k] memset_erms 0,25% python3.6 [.] 0x000436c0 0,24% [kernel][k] acpi_ns_search_and_enter 0,24% python3.6 [.] 0x00043710 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Hi Mio, Can you install linux-tools-generic and use `perf top` to see which functions cause this issue? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. -
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
here is the mailing list post https://marc.info/?l=linux- acpi&m=152675757008502&w=2 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion:
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
sorry i continued posting with information i thought might be relevant or helpful without reloading the page and did not see the new comments. I did now send the report as requested. How do i know when it is available in the archives? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.produ
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Mio, if you want an upstream developer to review your problem and submit a fix patch, you *need* to file a *new* upstream report as previously advised (not continue to post here on Launchpad). Otherwise your issue may never be addressed. ** Tags removed: regression-potential ** Tags added: needs-filing-upstream -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
I did some more research and found this kernel bug https://bugzilla.kernel.org/show_bug.cgi?id=53071 which seems to descibe exactly this issue. In that thread there is mentioned that a bios update might fix the problem. Thus I went hunting for an update for my model since the Software Update tool from Samsung does not show any updates. Eventually i found this https://www.samsung.com/us/support/owners/product/np700z7c (could not find an equivalent on the german site..). At "firmware" there is a download button that does work for me but in the HTML code there is a link http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=US&CttFileID=4986477&CDCttType=FM&ModelType=C&ModelName=NP700Z7C-S01US&VPath=FM/201203/20120305100525911/BIOSUpdate.exe which leads to a BIOS Update Tool (changing the modelname to my model leads to the same download) lunching this from windows allowed me to update to version P06AAE from P04AAE. I can confirm that this does NOT solve the issue of the gpe13 interrupt spamming. In that kernel bug it is mentioned that the output of dmidecode might be / is useful to fix this. Thus I have attached that here too (executed after the bios update as you can see) ** Bug watch added: Linux Kernel Bug Tracker #53071 https://bugzilla.kernel.org/show_bug.cgi?id=53071 ** Attachment added: "dmidecode output" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/5141627/+files/dmidecode.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb Pr
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Mio, please don't change the Description. It is filled with old, irrelevant, and speculative statements that confuse and hinder developers resolving the problem. Despite this, have you reported this upstream as noted in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/comments/73 ? ** Description changed: - I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. - I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): - On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. - The laptop seems to have to rest a while to have a chance that it won't happen. - If it does not happen a reboot will show the behavior. + I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 + or kworker/0:2. This does not always happen. On some boots all is fine + but once it shows, rebooting does not make it go away. - Full computer model is Samsung Chronos 7 NP700Z7C-S02DE - - Edit: workaround is - echo disable > /sys/firmware/acpi/interrupts/gpe13 + WORKAROUND: Execute: + echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AA
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
** Description changed: - I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. - This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. + I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. + I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): + On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. + The laptop seems to have to rest a while to have a chance that it won't happen. + If it does not happen a reboot will show the behavior. - WORKAROUND: Execute: - echo "disable" > /sys/firmware/acpi/interrupts/gpe13 + Full computer model is Samsung Chronos 7 NP700Z7C-S02DE + + Edit: workaround is + echo disable > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Mio, the issue you are reporting is an upstream one. Could you please report this problem following the instructions verbatim at https://wiki.ubuntu.com/Bugs/Upstream/kernel to the appropriate mailing list (TO: Rafael J. Wysocki and Len Brown CC: linux-acpi)? Please provide a direct URL to your post to the mailing list when it becomes available so that it may be tracked. Thank you for your help. ** Changed in: linux (Ubuntu) Importance: Medium => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Triaged Bug description: I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. WORKAROUND: Execute: echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor:
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
** Description changed: - I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. - I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): - On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. - The laptop seems to have to rest a while to have a chance that it won't happen. - If it does not happen a reboot will show the behavior. + I see high (70-90%) cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. + This does not always happen. On some boots all is fine but once it shows, rebooting does not make it go away. - I saw similar bug reports in various places but it seems that this can - have a multitude of causes and the presented workarounds or fixes did - not apply to me. + WORKAROUND: Execute: + echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. - --- + --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: - USERPID ACCESS COMMAND - /dev/snd/controlC0: mio1568 F pulseaudio + USERPID ACCESS COMMAND + /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: - linux-restricted-modules-4.15.0-20-generic N/A - linux-backports-modules-4.15.0-20-generic N/A - linux-firmware 1.173 + linux-restricted-modules-4.15.0-20-generic N/A + linux-backports-modules-4.15.0-20-generic N/A + linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.t
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Full computer model is Samsung Chronos 7 NP700Z7C-S02DE ** Tags removed: needs-full-computer-model -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No As
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
i tested the 4.17.0-rc4 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc4/ and can confirm that this is still an issue there 4.17.0-rc5 would not boot ** Tags removed: needs-upstream-testing ** Tags added: kernel-bug-exists-upstream kernel-bug-exists-upstream-4.17.0-rc4 ** Tags removed: kernel-bug-exists-upstream-4.17.0-rc4 ** Tags added: kernel-bug-exists-upstream-4.17-rc4 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: T
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
the above apport was sent while gpe13 interrup was enabled and issue was occurring (massive amount of interrupt, high cpu usage) $ cat /sys/firmware/acpi/interrupts/gpe13 3913101 STS enabled unmasked just in a few seconds -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.boar
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
the above apport was sent from the current 18.04 release (with gpe13 interrupt disabled). I did a fresh install and noticed again this problem ** Changed in: linux (Ubuntu) Status: Expired => New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
the workaround was the same as described in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1491467 echo "disable" > /sys/firmware/acpi/interrupts/gpe13 ** Description changed: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSC
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
the above apport was sent while gpe13 interrup was enabled and issue was occurring (massive amount of interrupt, high cpu usage) $ cat /sys/firmware/acpi/interrupts/gpe13 3913101 STS enabled unmasked just in a few seconds -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in linux package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1568 F pulseaudio CurrentDesktop: Unity:Unity7:ubuntu DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb InstallationDate: Installed on 2018-05-09 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.boar
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
apport information ** Tags added: apport-collected bionic ** Description changed: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. + --- + ApportVersion: 2.20.9-0ubuntu7 + Architecture: amd64 + AudioDevicesInUse: + USERPID ACCESS COMMAND + /dev/snd/controlC0: mio1568 F pulseaudio + CurrentDesktop: Unity:Unity7:ubuntu + DistroRelease: Ubuntu 18.04 + HibernationDevice: RESUME=UUID=3f9af81f-77f0-4438-9a4b-6722de269cbb + InstallationDate: Installed on 2018-05-09 (9 days ago) + InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) + MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=UUID=7c436149-ab84-40d0-919f-032364393f9b ro quiet splash video=VGA1:d nouveau.runpm=0 vt.handoff=1 + ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 + RelatedPackageVersions: + linux-restricted-modules-4.15.0-20-generic N/A + linux-backports-modules-4.15.0-20-generic N/A + linux-firmware 1.173 + Tags: bionic + Uname: Linux 4.15.0-20-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 08/02/2012 + dmi.bios.vendor: Phoenix Technologies Ltd. + dmi.bios.version: P04AAE + dmi.board.asset.tag: Base Board Asset Tag + dmi.board.name: SAMSUNG_NP1234567890 + dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. + dmi.board.version: FAB1 + dmi.chassis.asset.tag: No Asset Tag + dmi.chassis.type: 9 + dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. + dmi.chassis.version: 0.1 + dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECT
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Pablo Almeida, making "Me too!" comments is just simply unhelpful. However, so your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into the default Ubuntu kernel (not a mainline one) via: ubuntu-bug linux For more on this, please read the official Ubuntu documentation: Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette When opening up the new report, please feel free to subscribe me to it. As well, please do not announce in this report you created a new bug report. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Just had this again. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Vladimir Scherbaev, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into a Ubuntu repository kernel (not a mainline one) via: ubuntu-bug linux For more on this, please read the official Ubuntu documentation: Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette When opening up the new report, please feel free to subscribe me to it. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Incomplete Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
I have 12.04, but I try all availiable kernels from 12.10, 13.04, 13.10 and this bug affect me ** Changed in: linux (Ubuntu) Status: Expired => New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Confirmed Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Mark Holtzhausen, please do not apport-collect to this bug as you are not the original reporter. If you have a bug in Ubuntu, the Ubuntu Kernel team, Ubuntu Bug Control team, and Ubuntu Bug Squad would like you to please file a new report by executing the following in a terminal while booted into a Ubuntu repository kernel (not a mainline one) via: ubuntu-bug linux For more on this, please read the official Ubuntu documentation: Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette When opening up the new report, please feel free to subscribe me to it. Please note, not filing a new report would delay your problem being addressed as quickly as possible. No need exists to comment here at this time. After reading the above documentation in it's entirety, if you have further questions or comments, you are welcome to redirect them to the appropriate mailing list or forum via http://www.ubuntu.com/support/community/mailinglists , or you may contact me directly. Thank you for your understanding. ** Tags removed: apport-collected saucy ** Attachment removed: "WifiSyslog.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915920/+files/WifiSyslog.txt ** Attachment removed: "UdevLog.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915919/+files/UdevLog.txt ** Attachment removed: "RfKill.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915917/+files/RfKill.txt ** Attachment removed: "UdevDb.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915918/+files/UdevDb.txt ** Attachment removed: "ProcModules.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915915/+files/ProcModules.txt ** Attachment removed: "PulseList.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915916/+files/PulseList.txt ** Attachment removed: "ProcInterrupts.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915914/+files/ProcInterrupts.txt ** Attachment removed: "ProcCpuinfo.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915912/+files/ProcCpuinfo.txt ** Attachment removed: "ProcEnviron.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915913/+files/ProcEnviron.txt ** Attachment removed: "Lsusb.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915911/+files/Lsusb.txt ** Attachment removed: "Lspci.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915910/+files/Lspci.txt ** Attachment removed: "IwConfig.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915909/+files/IwConfig.txt ** Attachment removed: "CRDA.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915907/+files/CRDA.txt ** Attachment removed: "BootDmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915906/+files/BootDmesg.txt ** Attachment removed: "AlsaInfo.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915905/+files/AlsaInfo.txt ** Attachment removed: "CurrentDmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+attachment/3915908/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mark 1883 F pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=c15da4c5-75e7-4590-ad12-5b994dd400bb InstallationDate: Installed on 2013-11-23 (0 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z3C/700Z5C MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-13-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 RelatedPackageVersions: linux-restricted-modules-3.11.0-13-generic N/A linux-backports-modules-3.11.0-13-generic N/A linux-firmware 1.116 Tags: saucy Uname: Linux 3.11.0-13-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 09/19/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04ABJ dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: NP700Z5C-SO2ZA dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04ABJ:bd09/19/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z3C/700Z5C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP700Z5C-SO2ZA:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z3C/700Z5C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. ** Tags added: apport-collected saucy -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Expired Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04AAE:bd08/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 700Z7C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087010/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1087010] Re: kworker uses 70-90% of a CPU core (hyperthreaded)
Mio, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com /daily-live/current/ . If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p linux Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.11-rc5 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** This bug is no longer a duplicate of bug 887793 Kworker constantly taking about 100% CPU ** Tags added: needs-full-computer-model needs-upstream-testing regression-potential -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1087010 Title: kworker uses 70-90% of a CPU core (hyperthreaded) Status in “linux” package in Ubuntu: Incomplete Bug description: I see high cpu usage from a kworker thread. Usually kworker/0:1 or kworker/0:2. I tested various kernels from Ubuntu and mainline (3.5.0-x, 3.6.x, 3.7.0-rcx) and they all showed the same behavior. This does not always happen. I wasn't able to determine on which basis it happens. Some observations that may as well be wrong (duh!): On some boot all is fine but once it shows, no matter how many reboots it does not seem to want to go away again. The laptop seems to have to rest a while to have a chance that it won't happen. If it does not happen a reboot will show the behavior. I saw similar bug reports in various places but it seems that this can have a multitude of causes and the presented workarounds or fixes did not apply to me. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-19-generic 3.5.0-19.30 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: mio1965 F pulseaudio /dev/snd/pcmC0D0p: mio1965 F...m pulseaudio Date: Wed Dec 5 22:37:00 2012 HibernationDevice: RESUME=UUID=a371882c-0fe7-45e5-9adb-83da8374bc11 InstallationDate: Installed on 2012-10-10 (55 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z7C MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=79674508-93de-43e0-b313-f6a9b480c606 ro crashkernel=384M-2G:64M,2G-:128M acpi_osi=Linux pcie_aspm=force i915.modeset=1 i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.semaphores=1 i915.powersave=1 snd_hda_intel.power_save_controller=1 snd_hda_intel.power_save=1 quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/mio not ours. No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.5.0-19-generic N/A linux-backports-modules-3.5.0-19-generic N/A linux-firmware1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-11 (55 days ago) dmi.bios.date: 08/02/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P04AAE dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: S
