kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report[0]? That will allow the upstream Developers to examine the issue,
and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to
email the appropriate mailing list. If no response is received, then a
bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-
reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

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https://bugs.launchpad.net/bugs/1255777

Title:
  kworker process takes up ~95% of one CPU after suspending and resuming

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  On my computer, everytime I suspend and resume, a process appears
  called kworker and takes around 95% CPU until next reboot. Contrary to
  what I've seen around, the lid doesn't have to be closed and it
  doesn't affect the next suspending.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pablo      1565 F.... pulseaudio
  Date: Wed Nov 27 22:26:17 2013
  InstallationDate: Installed on 2013-11-22 (5 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Semp Toshiba Informatica Ltda STI UB 1401
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=3e3b8395-cedc-465a-938b-6ca56aba7539 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/29/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: STI UB 1401
  dmi.board.vendor: Semp Toshiba Informatica Ltda
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 9
  dmi.chassis.vendor: Semp Toshiba Informatica Ltda
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd05/29/2012:svnSempToshibaInformaticaLtda:pnSTIUB1401:pvrRev.10/00:rvnSempToshibaInformaticaLtda:rnSTIUB1401:rvrTobefilledbyO.E.M.:cvnSempToshibaInformaticaLtda:ct9:cvrToBeFilledByO.E.M.:
  dmi.product.name: STI UB 1401
  dmi.product.version: Rev. 10/00
  dmi.sys.vendor: Semp Toshiba Informatica Ltda

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