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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1498387

Title:
  system hangs and CPU heats up in -29 but not -28

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I filed this bug against linux-image-3.19.0-29-generic and hope that
  it has attached everything relevant.

  With linux-image-3.19.0-29-generic I can only run my thinkpad X240 for
  a few hours before I invariably trip over this bug and cause it to
  hang, heating up and driving the fan to full speed.  I never have this
  trouble when I select linux-image-3.19.0-28-generic.  Occasionally
  I'll reboot for updates (such as the recent network manager one) and
  forget to go down a build number, and I hit this again shortly after
  reboot.

  The screen remains in whatever state it was in, but I am unable to
  move the mouse or affect X with the keyboard (including trying to
  switch to a virtual console with Ctrl-Alt-F1).  Nothing suspicious
  shows up in kern.log after the reboot, but I tend to have to do a hard
  power-off to get back to a useful machine so the journal may not be
  fully checkpointed in time.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-29-generic 3.19.0-29.31
  ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
  Uname: Linux 3.19.0-28-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nick       2766 F.... pulseaudio
   /dev/snd/controlC1:  nick       2766 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Sep 22 10:20:31 2015
  HibernationDevice: RESUME=UUID=dae1fd50-2dc0-48b2-bd93-5823478772b6
  InstallationDate: Installed on 2014-05-29 (480 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20ALCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-28-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.143.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-05-05 (139 days ago)
  dmi.bios.date: 02/06/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GIET69WW (2.19 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ALCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98405 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGIET69WW(2.19):bd02/06/2014:svnLENOVO:pn20ALCTO1WW:pvrThinkPadX240:rvnLENOVO:rn20ALCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20ALCTO1WW
  dmi.product.version: ThinkPad X240
  dmi.sys.vendor: LENOVO

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