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[MarcS <897821@xxxxxxxxxxxxxxxxxx>]

Wow, thanks for coming back to this.

It's been a while since I've filed this report, I must have stopped
experiencing the bug quite some time ago. I also changed to another
distribution more than a year ago (unrelated to this bug), so I really
can't say whether it's still present, sorry.

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https://bugs.launchpad.net/bugs/897821

Title:
  Null pointer dereference in drm_debugfs_remove_files

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Launching Firefox (from the KDE panel) sporadically causes a kernel Oops (Null pointer dereference) in drm_debugfs_remove_files (output is attached).
  The system continues to run, and after returning to the desktop session by switching away from the vt and back again, Firefox is actually running.

  EDIT: The bug appears since the upgrade to oneiric, both with Firefox
  7 and now 8.

  $ lsb_release -rd
  Description:    Ubuntu 11.10
  Release:        11.10

  $ apt-cache policy xserver-xorg-video-nouveau
  xserver-xorg-video-nouveau:
    Installed: 1:0.0.16+git20110411+8378443-1
    Candidate: 1:0.0.16+git20110411+8378443-1
    Version table:
   *** 1:0.0.16+git20110411+8378443-1 0
          500 http://de.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic-pae 3.0.6
  Uname: Linux 3.0.0-13-generic-pae i686
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Tue Nov 29 20:09:59 2011
  EcryptfsInUse: Yes
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: xserver-xorg-video-nouveau
  UpgradeStatus: Upgraded to oneiric on 2011-10-13 (47 days ago)
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC861-VD Analog [ALC861-VD Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC861-VD Analog [ALC861-VD Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  marc       3980 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfc300000 irq 47'
     Mixer name	: 'Realtek ALC861-VD'
     Components	: 'HDA:10ec0862,17aa3867,00100001'
     Controls      : 19
     Simple ctrls  : 12
  DistroRelease: Ubuntu 11.10
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=79a83231-1718-4040-a4aa-0060c32fe112
  MachineType: LENOVO 0769AP2
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic-pae root=UUID=d5677094-c049-4df2-bbae-a8fac07758a1 ro pcie_aspm=force
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic-pae 3.0.6
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-13-generic-pae N/A
   linux-backports-modules-3.0.0-13-generic-pae  N/A
   linux-firmware                                1.60
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  Tags:  oneiric
  Uname: Linux 3.0.0-13-generic-pae i686
  UpgradeStatus: Upgraded to oneiric on 2011-10-13 (50 days ago)
  UserGroups: adm admin audio backup cdrom dialout lpadmin plugdev rtkit sambashare subversion
  WpaSupplicantLog:
   
  dmi.bios.date: 07/29/2008
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 68ET37WW
  dmi.board.name: IEL10
  dmi.board.vendor: LENOVO
  dmi.board.version: REFERENCE
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnLENOVO:bvr68ET37WW:bd07/29/2008:svnLENOVO:pn0769AP2:pvr3000N200:rvnLENOVO:rnIEL10:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
  dmi.product.name: 0769AP2
  dmi.product.version: 3000 N200
  dmi.sys.vendor: LENOVO

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