[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

** Tags removed: needs-reverse-bisect
** Tags added: bisect-done

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

Perhaps I misspoke in my last comment. I'm guessing that since the
bisect was reversed that the "first bad commit" is actually the first
good commit?

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

Alright, so I noticed that 4.9-rc1 is still good, so I did a reverse
commit bisect between 4.8 and r.9-rc1. Here was the final result:

2a5708409e4e05446eb1a89ecb48641d6fd5d5a9 is the first bad commit
commit 2a5708409e4e05446eb1a89ecb48641d6fd5d5a9
Author: Lv Zheng 
Date:   Wed Sep 7 16:50:21 2016 +0800

ACPI / EC: Fix a gap that ECDT EC cannot handle EC events

It is possible to register _Qxx from namespace and use the ECDT EC to
perform event handling. The reported bug reveals that Windows is using ECDT
in this way in case the namespace EC is not present. This patch facilitates
Linux to support ECDT in this way.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=115021
Reported-and-tested-by: Luya Tshimbalanga 
Tested-by: Jonh Henderson 
Reviewed-by: Peter Wu 
Signed-off-by: Lv Zheng 
Signed-off-by: Rafael J. Wysocki 


The parent of that commit (which I am assuming is the "good commit") is:

commit 46922d2a3aff5122253d97e64500801c08f4f2c0
Author: Lv Zheng 
Date:   Wed Sep 7 16:50:14 2016 +0800

ACPI / EC: Fix a memory leakage issue in acpi_ec_add()

When the handler installation failed, there was no code to free the
allocated EC device. This patch fixes this memory leakage issue.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=115021
Reported-and-tested-by: Luya Tshimbalanga 
Tested-by: Jonh Henderson 
Signed-off-by: Lv Zheng 
Signed-off-by: Rafael J. Wysocki 

Let me know if you need anything else.

** Bug watch added: Linux Kernel Bug Tracker #115021
   http://bugzilla.kernel.org/show_bug.cgi?id=115021

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

Christopher, a backport to 16.10 would be much appreciated so I can have
a usable setup (while waiting for 17.04) and be a happy and productive
developer again.

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

Since 17.04 uses the 4.9 kernel, yes, it does indeed work. I did boot
the daily live iso anyway and as expected, it works fine.

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

** Tags added: kernel-fixed-upstream kernel-fixed-upstream-4.9

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1653327] UdevDb.txt

[mscdex]

apport information

** Attachment added: "UdevDb.txt"
   https://bugs.launchpad.net/bugs/1653327/+attachment/4798518/+files/UdevDb.txt

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[Bug 1653327] ProcModules.txt

[mscdex]

apport information

** Attachment added: "ProcModules.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798515/+files/ProcModules.txt

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[Bug 1653327] ProcInterrupts.txt

[mscdex]

apport information

** Attachment added: "ProcInterrupts.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798514/+files/ProcInterrupts.txt

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[Bug 1653327] WifiSyslog.txt

[mscdex]

apport information

** Attachment added: "WifiSyslog.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798519/+files/WifiSyslog.txt

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1653327] ProcCpuinfo.txt

[mscdex]

apport information

** Attachment added: "ProcCpuinfo.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798512/+files/ProcCpuinfo.txt

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[Bug 1653327] IwConfig.txt

[mscdex]

apport information

** Attachment added: "IwConfig.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798508/+files/IwConfig.txt

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[Bug 1653327] ProcEnviron.txt

[mscdex]

apport information

** Attachment added: "ProcEnviron.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798513/+files/ProcEnviron.txt

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[Bug 1653327] RfKill.txt

[mscdex]

apport information

** Attachment added: "RfKill.txt"
   https://bugs.launchpad.net/bugs/1653327/+attachment/4798517/+files/RfKill.txt

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[Bug 1653327] Lsusb.txt

[mscdex]

apport information

** Attachment added: "Lsusb.txt"
   https://bugs.launchpad.net/bugs/1653327/+attachment/4798511/+files/Lsusb.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] PulseList.txt

[mscdex]

apport information

** Attachment added: "PulseList.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798516/+files/PulseList.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] JournalErrors.txt

[mscdex]

apport information

** Attachment added: "JournalErrors.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798509/+files/JournalErrors.txt

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[Bug 1653327] Lspci.txt

[mscdex]

apport information

** Attachment added: "Lspci.txt"
   https://bugs.launchpad.net/bugs/1653327/+attachment/4798510/+files/Lspci.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] CRDA.txt

[mscdex]

apport information

** Attachment added: "CRDA.txt"
   https://bugs.launchpad.net/bugs/1653327/+attachment/4798506/+files/CRDA.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

apport information

** Tags added: apport-collected

** Description changed:

  After upgrading my Sony Vaio Pro 13 to Lubuntu 16.10 and logging in for
  the first time, I noticed the fans were spinning crazy fast. Since
  nothing was open and I hadn't done anything since the upgrade yet, I
  looked at top. There it showed systemd-journal and rsyslog using 100%
  CPU.
  
  I looked at /var/log/syslog and there was a flood of messaging
  continually being appended of the form:
  
 ACPI Error: no handler or method for gpe ... disabling event ...
  
  The system was still somewhat usable, so I tried checking for updates,
  but there wasn't anything to update. Since I never encountered this
  error before, I tried installing a mainline kernel (4.9) from the Ubuntu
  mainline kernel PPA. I booted into the new, mainline kernel and no more
  100% CPU usage. The only problem with using this kernel is that I can't
  use VirtualBox anymore because dkms has a compilation issue when
  building against the 4.9 kernel.
  
  Before upgrading to 16.10, I was using Lubuntu 16.04 with whatever the
  latest 4.4 kernel was at the time that 16.10 was released, which also
  worked just fine.
  
- The current (as of this writing) 4.8 kernel that is still causing
- problems is 4.8.0-32.
+ The current (as of this writing) 4.8 kernel that is still causing problems is 
4.8.0-32.
+ --- 
+ ApportVersion: 2.20.3-0ubuntu8.2
+ Architecture: amd64
+ AudioDevicesInUse:
+  USERPID ACCESS COMMAND
+  /dev/snd/controlC0:  mscdex 1812 F pulseaudio
+  /dev/snd/controlC1:  mscdex 1812 F pulseaudio
+ CurrentDesktop: LXDE
+ DistroRelease: Ubuntu 16.10
+ InstallationDate: Installed on 2013-12-07 (1119 days ago)
+ InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
+ MachineType: Sony Corporation SVP13213CXB
+ Package: linux (not installed)
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-32-generic 
root=UUID=97c33b42-d845-488d-9a1f-d62e03702b16 ro quiet splash 
libata.force=noncq acpi_backlight=vendor vt.handoff=7
+ ProcVersionSignature: Ubuntu 4.8.0-32.34-generic 4.8.11
+ RelatedPackageVersions:
+  linux-restricted-modules-4.8.0-32-generic N/A
+  linux-backports-modules-4.8.0-32-generic  N/A
+  linux-firmware1.161.1
+ Tags:  yakkety
+ Uname: Linux 4.8.0-32-generic x86_64
+ UpgradeStatus: Upgraded to yakkety on 2016-12-17 (14 days ago)
+ UserGroups: adm audio cdrom dip lpadmin netdev plugdev sambashare sudo 
vboxusers wireshark
+ _MarkForUpload: True
+ dmi.bios.date: 11/05/2013
+ dmi.bios.vendor: American Megatrends Inc.
+ dmi.bios.version: R1041V7
+ dmi.board.asset.tag: N/A
+ dmi.board.name: VAIO
+ dmi.board.vendor: Sony Corporation
+ dmi.board.version: N/A
+ dmi.chassis.asset.tag: N/A
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Sony Corporation
+ dmi.chassis.version: N/A
+ dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrR1041V7:bd11/05/2013:svnSonyCorporation:pnSVP13213CXB:pvrC60C2CVE:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
+ dmi.product.name: SVP13213CXB
+ dmi.product.version: C60C2CVE
+ dmi.sys.vendor: Sony Corporation

** Attachment added: "AlsaInfo.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798505/+files/AlsaInfo.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] CurrentDmesg.txt

[mscdex]

apport information

** Attachment added: "CurrentDmesg.txt"
   
https://bugs.launchpad.net/bugs/1653327/+attachment/4798507/+files/CurrentDmesg.txt

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  100% cpu usage with 4.8 kernel after upgrade to 16.10

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[Bug 1653327] Re: 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

** Package changed: ubuntu => linux (Ubuntu)

** Tags removed: bot-comment

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[Bug 1653327] [NEW] 100% cpu usage with 4.8 kernel after upgrade to 16.10

[mscdex]

Public bug reported:

After upgrading my Sony Vaio Pro 13 to Lubuntu 16.10 and logging in for
the first time, I noticed the fans were spinning crazy fast. Since
nothing was open and I hadn't done anything since the upgrade yet, I
looked at top. There it showed systemd-journal and rsyslog using 100%
CPU.

I looked at /var/log/syslog and there was a flood of messaging
continually being appended of the form:

   ACPI Error: no handler or method for gpe ... disabling event ...

The system was still somewhat usable, so I tried checking for updates,
but there wasn't anything to update. Since I never encountered this
error before, I tried installing a mainline kernel (4.9) from the Ubuntu
mainline kernel PPA. I booted into the new, mainline kernel and no more
100% CPU usage. The only problem with using this kernel is that I can't
use VirtualBox anymore because dkms has a compilation issue when
building against the 4.9 kernel.

Before upgrading to 16.10, I was using Lubuntu 16.04 with whatever the
latest 4.4 kernel was at the time that 16.10 was released, which also
worked just fine.

The current (as of this writing) 4.8 kernel that is still causing
problems is 4.8.0-32.

** Affects: ubuntu
 Importance: Undecided
 Status: New


** Tags: kernel-bug yakkety

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