kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Also, can you test the latest mainline kernel, 4.2 final?  I'd like to
confirm the bug is not fixed in mainline yet.  If it is, we can perform
a "Reverse" bisect to identify the commit that is the fix.  The mainline
kernel can be downloaded from:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable/

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https://bugs.launchpad.net/bugs/1491467

Title:
  kworker consuming cpu due to GPE13 interrupt storm on Fujitsu A544

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  On Fujitsu A544 laptop (and likely others) fitted with SSD, kworker
  takes 100% of one core of CPU due to GPE13 interrupt storm

  See upstream bug https://bugzilla.kernel.org/show_bug.cgi?id=53071

  The bug can be identified by repeatedly running 
  cat /sys/firmware/acpi/interrupts/gpe13
  where a rapidly increasing count will be seen.

  Workaround:
  sudo sh -c 'echo "disable" > /sys/firmware/acpi/interrupts/gpe13'
  disables it until reboot
  Using 
  sudo crontab -e
  and adding the line
  @reboot echo "disable" > /sys/firmware/acpi/interrupts/gpe13
  works around for subsequent boots.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.1.0-3-generic 4.1.0-3.3
  ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3
  Uname: Linux 4.1.0-3-generic x86_64
  ApportVersion: 2.18-0ubuntu9
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  colinl     1699 F.... pulseaudio
   /dev/snd/controlC1:  colinl     1699 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep  2 16:03:19 2015
  InstallationDate: Installed on 2014-10-21 (316 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20141017)
  MachineType: FUJITSU LIFEBOOK A544
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.1.0-3-generic root=UUID=c68c6484-d8d6-44f6-b429-892aa6ef74cf ro
  RelatedPackageVersions:
   linux-restricted-modules-4.1.0-3-generic N/A
   linux-backports-modules-4.1.0-3-generic  N/A
   linux-firmware                           1.147
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: yes
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-08-31 (1 days ago)
  dmi.bios.date: 04/01/2015
  dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
  dmi.bios.version: Version 1.19
  dmi.board.name: FJNBB35
  dmi.board.vendor: FUJITSU
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU
  dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.19:bd04/01/2015:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr:
  dmi.product.name: LIFEBOOK A544
  dmi.sys.vendor: FUJITSU

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