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[Pieter van Erp <pverp@xxxxxxxxx>]

apport information

** Attachment added: "UdevLog.txt"
   https://bugs.launchpad.net/bugs/1306955/+attachment/4081895/+files/UdevLog.txt

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https://bugs.launchpad.net/bugs/1306955

Title:
  Kernel Oops - unable to handle kernel NULL pointer dereference; EIP is
  at free_thread_info+0xb/0x30

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Since upgrading from 10.04 to 12.04, my server suffers from frequent
  freezes. I have been unable to find a pattern and the freeze
  'behaviour' is not always the same: usually the system does not
  respond at all anymore, and sometimes an error message is printed to
  the console:

  BUG: unable to handle kernel NULL pointer dereference at   (null)
  free_thread_info+0xb/0x30

  The attached kern.log file has the full error messages.

  Usually the system can reboot using Alt+SysReq+B, but sometimes that
  doesn't even work. And on rare occasions the keyboard lights start
  blinking.

  Now, there might be more than 1 problem at hand here, but at least
  I've got an error message now.

  PS: on 10.04 I also had occasional freezes, but that averaged once every 3 months or so. Now it happens once every three days.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pieter    12649 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'SB'/'HDA ATI SB at 0xfe8f4000 irq 16'
     Mixer name	: 'Realtek ALC889'
     Components	: 'HDA:10ec0889,14627596,00100004'
     Controls      : 46
     Simple ctrls  : 22
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=02334aab-e86b-46ec-86b6-ff6495e14a50
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7596
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-60-generic root=UUID=4cb48b96-0121-4016-95a7-b076f6a61653 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-60-generic N/A
   linux-backports-modules-3.2.0-60-generic  N/A
   linux-firmware                            1.79.11
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-60-generic i686
  UpgradeStatus: Upgraded to precise on 2014-01-12 (90 days ago)
  UserGroups:
   
  dmi.bios.date: 04/23/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V2.6
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: 785GM-E51 (MS-7596)
  dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.6:bd04/23/2010:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7596:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rn785GM-E51(MS-7596):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
  dmi.product.name: MS-7596
  dmi.product.version: 1.0
  dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD

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