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[Colin Law <1491467@xxxxxxxxxxxxxxxxxx>]

I can confirm that updating to BIOS 1.20 also fixes it for me (with SSD
drive).  Strange that the problem only exhibited itself with certain
kernel versions.  So it seems Joseph and myself have wasted our time
bisecting the kernel.  Sorry Joseph.  I learnt a lot in the process
however.  I will close the bug, I presume that correct status is '
invalid'.

** Changed in: linux (Ubuntu)
       Status: In Progress => Invalid

** Changed in: linux (Ubuntu Wily)
       Status: In Progress => Invalid

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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:
  Invalid
Status in linux source package in Wily:
  Invalid

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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