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[Nicola <1229118@xxxxxxxxxxxxxxxxxx>]

Hi Josep,

yes this bug appeared after an upgrade, I was previously using kernel 3.2.0-47 and this bug did not occur.
I am attaching another trace that I got again with kernel 3.2.0-54, the overall symptom is the same (system crashes) though the kernel log looks a bit different.

I'll give a try to the mainline kernel and let you know.


** Attachment added: "another trace with kernel 3.2.0-54"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1229118/+attachment/3856999/+files/kernel-log-2.txt

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https://bugs.launchpad.net/bugs/1229118

Title:
  BUG: unable to handle kernel NULL pointer dereference at
  0000000000000010

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  During normal use, the system crashed reporting this message: 
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 
  I am attaching the kernel backtrace that was dumped to the console and to kern.log

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-54-generic 3.2.0-54.82
  ProcVersionSignature: Ubuntu 3.2.0-54.82-generic 3.2.50
  Uname: Linux 3.2.0-54-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.4
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nicola     2291 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xe2e60000 irq 47'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:111d76e7,10280492,00100102 HDA:80862805,80860101,00100000'
     Controls      : 37
     Simple ctrls  : 13
  Date: Mon Sep 23 12:06:37 2013
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  MachineType: Dell Inc. Latitude E6320
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-54-generic root=UUID=1efb2c8a-140f-4f44-9a98-fe9c6810c31c ro crashkernel=384M-2G:64M,2G-:128M quiet splash drm_kms_helper.poll=0 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-54-generic N/A
   linux-backports-modules-3.2.0-54-generic  N/A
   linux-firmware                            1.79.6
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to precise on 2012-08-27 (392 days ago)
  dmi.bios.date: 03/07/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A17
  dmi.board.name: 0GJF11
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA17:bd03/07/2013:svnDellInc.:pnLatitudeE6320:pvr01:rvnDellInc.:rn0GJF11:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6320
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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