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[Tim Crowther <tim@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

I have not been able to test the upstream kernel - it seems to be unable
to set my graphics card to produce any output.

However, I have been able to create a fresh install of 12.04 on a
different hard disk - the other hardware exactly the same, just a
different hard disk. I started with the original 12.04 CD and then took
all the available updates including 3.2.0-56 so that the setup should
have been as near as possible the same as the one that caused trouble.

The result is - it seems to run just fine. Hence at the moment my
assumption is that the problem was due to some unidentified mishap
during the update to 3.2.0-56.

I am intending to do an install of 13.10 to a different hard disk. When
I have that established as a working environment I will  try a surface
scan of the disk with the problem setup and perhaps try to uninstall and
reinstall 3.2.0-56 to see what happens.

I do have a copy of the relevant kernel log showing call stack dumps and
'BUG' messages that I could add if you think it would be of any help.
Otherwise I will update this report if I can find anything that might be
of interest when I am in a position to investigate further.

-- 
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https://bugs.launchpad.net/bugs/1249758

Title:
  12.04 freezing after update to 3.2.0-55/56

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After the most recent kernel upgrade to 12.04 released on or about
  November 8th 2013 my machine started to freeze after a variable period
  of use but only a few minutes in each case. The only thing I could
  then do was to power down and reboot - file system errors were usually
  found on restart. fsck was able to fix those. I have never previously
  had any such problems.

  Two full passes with Memcheck found no errors and disk utility reports
  no disk errors - read error rate is 0, reallocated sector count is 0.

  I have enabled the Grub menu and am now using 3.2.0-54 with no
  problems at all.

  The kernel and system logs do appear to show call stack dumps and
  'BUG' messages.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-54-generic-pae 3.2.0-54.82
  ProcVersionSignature: Ubuntu 3.2.0-54.82-generic-pae 3.2.50
  Uname: Linux 3.2.0-54-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: VT1708B 8-Ch Analog [VT1708B 8-Ch Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tim        1653 F.... pulseaudio
   /dev/snd/pcmC0D0p:   tim        1653 F...m pulseaudio
  CRDA:
   country GB:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5170 - 5250 @ 40), (N/A, 20)
   	(5250 - 5330 @ 40), (N/A, 20), DFS
   	(5490 - 5710 @ 40), (N/A, 27), DFS
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf9ffc000 irq 44'
     Mixer name	: 'VIA VT1708B 8-Ch'
     Components	: 'HDA:1106e721,104382ea,00100100'
     Controls      : 45
     Simple ctrls  : 20
  Date: Sun Nov 10 11:13:07 2013
  HibernationDevice: RESUME=UUID=0eec47a6-66e1-4ebf-9bbd-06f927a182f3
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: System manufacturer System Product Name
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-54-generic-pae root=UUID=3750354b-b3b5-411f-ad7f-62fbedf289f4 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-54-generic-pae N/A
   linux-backports-modules-3.2.0-54-generic-pae  N/A
   linux-firmware                                1.79.7
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/10/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0511
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5KPL-AM
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: x.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0511:bd04/10/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5KPL-AM:rvrx.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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