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[Bug 897821] Re: Null pointer dereference in drm_debugfs_remove_files

 

MarcS, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: bios-outdated-3.05

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

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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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