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[Launchpad Bug Tracker <1452614@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1452614

Title:
  Kworker using 100% CPU

Status in linux package in Ubuntu:
  Expired

Bug description:
  On a fresh vivid install, the kworker process is using a constant 100%
  of one of 4 virtual cores. This also happened on 13.10, I had to apply
  the same workaround back then.

  WORKAROUND:  http://askubuntu.com/questions/176565/why-does-kworker-
  cpu-usage-get-so-high

  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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