Public bug reported:
On a fresh vivid install, the kworker process is using a constant 100%
of one of 4 virtual cores. I can work around this issue by following the
following guide: http://askubuntu.com/questions/176565/why-does-kworker-
cpu-usage-get-so-high and it's the same issue as in #1087010
GPE13.
This also happened on 13.10, I had to apply the same workaround back
then.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-16-generic 3.19.0-16.16
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: development 2513 F.... pulseaudio
/dev/snd/controlC0: development 2513 F.... pulseaudio
Date: Thu May 7 09:32:33 2015
HibernationDevice: RESUME=UUID=4083aed8-20c6-481f-8a0d-f43f7f15131b
InstallationDate: Installed on 2015-05-01 (5 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: FUJITSU LIFEBOOK A544
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic.efi.signed
root=UUID=de8c8d39-7ff8-49e5-b4ff-3bb08f1bf5ce ro noprompt quiet splash
intel_pstate=disable vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.19.0-16-generic N/A
linux-backports-modules-3.19.0-16-generic N/A
linux-firmware 1.143
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2013
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.10
dmi.board.name: FJNBB35
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.modalias:
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.10:bd10/03/2013:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr:
dmi.product.name: LIFEBOOK A544
dmi.sys.vendor: FUJITSU
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1452614
Title:
Kworker using 100% CPU
Status in linux package in Ubuntu:
New
Bug description:
On a fresh vivid install, the kworker process is using a constant 100%
of one of 4 virtual cores. I can work around this issue by following
the following guide: http://askubuntu.com/questions/176565/why-does-
kworker-cpu-usage-get-so-high and it's the same issue as in #1087010
GPE13.
This also happened on 13.10, I had to apply the same workaround back
then.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-16-generic 3.19.0-16.16
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: development 2513 F.... pulseaudio
/dev/snd/controlC0: development 2513 F.... pulseaudio
Date: Thu May 7 09:32:33 2015
HibernationDevice: RESUME=UUID=4083aed8-20c6-481f-8a0d-f43f7f15131b
InstallationDate: Installed on 2015-05-01 (5 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: FUJITSU LIFEBOOK A544
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic.efi.signed
root=UUID=de8c8d39-7ff8-49e5-b4ff-3bb08f1bf5ce ro noprompt quiet splash
intel_pstate=disable vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.19.0-16-generic N/A
linux-backports-modules-3.19.0-16-generic N/A
linux-firmware 1.143
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2013
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.10
dmi.board.name: FJNBB35
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.modalias:
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.10:bd10/03/2013:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr:
dmi.product.name: LIFEBOOK A544
dmi.sys.vendor: FUJITSU
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