kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Eric Detheridge, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1482187

** Package changed: linux-lts-utopic (Ubuntu) => linux (Ubuntu)

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

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

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https://bugs.launchpad.net/bugs/1482187

Title:
  [147461.082140] BUG: soft lockup - CPU#3 stuck for 22s!
  [khugepaged:40]

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Happened right after a YouTube video of music finished. mouse and
  keyboard locked up but system monitor applet kept running showing full
  usage of all four cpu cores. tried to log on remotely but this was
  very slow. used htop to see what was using cpu but it showed only
  three cores active with boinc work units as usual conflicting with the
  system monitor applet. eventually htop stopped working. could not find
  excess cpu usage with top either. eventually the system monitor applet
  showed only 50% cpu usage with lots of io waiting. eventually did soft
  reset. cpu is overclocked but has run stable with heavy boinc usage
  for weeks.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-45-generic 3.16.0-45.60~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-45.60~14.04.1-generic 3.16.7-ckt14
  Uname: Linux 3.16.0-45-generic x86_64
  NonfreeKernelModules: fglrx
  Annotation: Your system might become unstable now and might need to be restarted.
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  Date: Thu Aug  6 06:00:27 2015
  Failure: oops
  InstallationDate: Installed on 2013-02-13 (904 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  SourcePackage: linux-lts-utopic
  Title: [147461.082140] BUG: soft lockup - CPU#3 stuck for 22s! [khugepaged:40]
  UpgradeStatus: Upgraded to trusty on 2014-05-12 (451 days ago)

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