← Back to team overview

kernel-packages team mailing list archive

[Bug 887793] Re: Kworker constantly taking about 100% CPU


Without doing anything to my machine, the problem went away.  However,
on my Lenovo T61P where it occurred, when kworker took a lot of CPU,
threeof the 11 thermometers the laptop has was red.  For two of them,
when the laptop is working hard, they are normally red so that was
usual.  But the 3rd one, I never saw it red, thus suggesting that
kworker had something to do with a piece of hardware which usually does
not work as hard.   Now that kworker is quiet, this thermometer is back
into blue, normal temperature.

Don't ask me what the thermometers are for, they are only labeled

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Kworker constantly taking about 100% CPU

Status in The Linux Kernel:
Status in “linux” package in Ubuntu:
Status in “linux” package in Arch Linux:
Status in “linux” package in Suse:

Bug description:
  I've this issue since the latest Ubuntu 11.10 version, all updates
  applied till today, and it's still there. Ubuntu 11.04 did not have
  this issue.

  If I run top there is a Kworker constantly taking much CPU, I don't
  know how to research where this comes from.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  kp         1473 F.... pulseaudio
  CRDA: Error: [Errno 2] Bestand of map bestaat niet
   Card hw:0 'Intel'/'HDA Intel at 0xe4404000 irq 46'
     Mixer name	: 'Analog Devices AD1981'
     Components	: 'HDA:11d41981,103c30c0,00100200 HDA:11c11040,103c1378,00100200'
     Controls      : 11
     Simple ctrls  : 9
  Date: Tue Nov  8 22:29:10 2011
  HibernationDevice: RESUME=UUID=ad8d4a18-9fe4-4246-ba44-85cf6b4dace5
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  MachineType: Hewlett-Packard HP Compaq 6710b (GB891ET#ABH)
   Socket 0:
     no product info available
   Socket 0:
     no card
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=686d2155-83a9-4743-a2a4-8e9570ee3da6 ro quiet splash vt.handoff=7
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/15/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68DDU Ver. F.15
  dmi.board.name: 30C0
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 71.2E
  dmi.chassis.asset.tag: CNU72913PH
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68DDUVer.F.15:bd01/15/2009:svnHewlett-Packard:pnHPCompaq6710b(GB891ET#ABH):pvrF.15:rvnHewlett-Packard:rn30C0:rvrKBCVersion71.2E:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP Compaq 6710b (GB891ET#ABH)
  dmi.product.version: F.15
  dmi.sys.vendor: Hewlett-Packard

To manage notifications about this bug go to: