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[Bug 1213917] Re: kworker thread consuming 99.8 - 100% CPU after update

 

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc6-saucy/


** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: regression-update

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

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https://bugs.launchpad.net/bugs/1213917

Title:
  kworker thread consuming 99.8 - 100% CPU after update

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After updating today (hadn't updated for a while), my fan won't stop
  and top is showing:

    PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND                                                                                 
      4 root      20   0     0    0    0 R 100,2  0,0  36:42.35 kworker/0:0                                                                             

  Let me know if I can provide more details.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-2-generic 3.11.0-2.5
  ProcVersionSignature: Ubuntu 3.11.0-2.5-generic 3.11.0-rc5
  Uname: Linux 3.11.0-2-generic x86_64
  ApportVersion: 2.12-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  michael    2372 F.... pulseaudio
  Date: Mon Aug 19 14:39:57 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=1efd421f-ac68-455b-b4d4-8912fa02494d
  MachineType: ASUSTeK COMPUTER INC. X201EP
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-2-generic.efi.signed root=UUID=05643352-201b-43e8-976a-c1d40d591e80 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-2-generic N/A
   linux-backports-modules-3.11.0-2-generic  N/A
   linux-firmware                            1.113
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/04/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X201EP.209
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X201EP
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX201EP.209:bd02/04/2013:svnASUSTeKCOMPUTERINC.:pnX201EP:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX201EP:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X201EP
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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