kernel-packages team mailing list archive

[Manuel <gmanuel89+launchpad@xxxxxxxxx>]

I am using a Fujitsu Lifebook A544, with normal HDD and optical drive.

The high-cpu load issue is present with kernel 3.19 (Ubuntu Trusty), 4.2
(Ubuntu Wily and Fedora 23) and 4.3 (Ubuntu Xenial), with BIOS 1.18 and
1.19. Moreover, the optical drive seems to be unable to read CDs and
DVDs.

After upgrading the BIOS to 1.20, the problem disappears with all the
aforementioned kernels, and the optical drive is back to reading CDs and
DVDs again.

I believe that the issue was known by Fujitsu itself, since it reports
the bug as fixed in the BIOS 1.19-1.20 changelog.

I am wondering if upgrading the BIOS solves the problem also for the
SSD-equipped laptop.

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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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