BUG: unable to handle kernel NULL pointer dereference at 0000000000000008

Bug #368186 reported by The UNIX Man on 2009-04-27
This bug affects 3 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

Binary package hint: linux-image-2.6.28-11-generic

When running with desktop effects, changing virtual desktops seems to consistently cause this. With desktop effects disabled, the kernel doesn't panic.

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
DistroRelease: Ubuntu 9.04
Failure: oops
HibernationDevice: RESUME=UUID=08385d47-580a-4bb5-a52f-46f493069cfb
MachineType: Hewlett-Packard HP Compaq 6910p (111111)
Package: linux-image-2.6.28-11-generic 2.6.28-11.42
ProcCmdLine: root=UUID=f54fb887-2a1e-4689-92f1-869436a1b400 ro single
ProcVersionSignature: Ubuntu 2.6.28-11.42-generic
SourcePackage: linux
Tags: kernel-oops
Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008

The UNIX Man (theunixman) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.

Your OppsText.txt report seems to point to bluetooth being related to the issue, specifically mentioning bluetoothd, which is contained in the bluez package (and installed by default in Jaunty). Please let us know the version of bluez that you are running, which can be obtained by typing "dpkg -s bluez" and copying the "Version:" field. Also, you have the btusb module loaded to support your "Hewlett-Packard Wireless (Bluetooth + WLAN) Interface"

Note that the following will temporarily disable any bluetooth devices:
To try to narrow down the issue, please disable the bluetooth daemon by opening System > Administration > Services, clicking the Unlock button, unchecking the square next to "Bluetooth device management" and then clicking the close button. Does the problem now continue with desktop effects enabled? After a reboot?

If it does panic, in the terminal, please type "sudo modprobe -r btusb" (which will remove the bluetooth driver from the running kernel), does the kernel still panic? Please post the outcome.

You may reverse all of this with "sudo modprobe btusb" and by opening the Services panel and checking the square next to "Bluetooth device management" again.

Thank you.

Changed in linux (Ubuntu):
status: New → Incomplete
Ardjan (ardjan-zwartjes) wrote :

I'm experiencing a problem which might be related (The oops described in my syslog seems similar to me, but I might be mistaken) so I've attached the trace from syslog here. If I'm experiencing the same bug I assume it is not related to bluetooth since that is not mentioned and although my laptop has bluetooth build in I'm not using it.
So far I've not been able to point out when this problem occurs on my laptop. My laptop just stops once a week on average.

Ardjan (ardjan-zwartjes) wrote :

Forgot to add more information about my system:
System: HP Compaq 8510w
Ubuntu 9.04
Kernel: 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux

Vish (vish) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue for you. Can you try with the latest Ubuntu release? Thanks in advance.

Jeremy Foshee (jeremyfoshee) wrote :

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: kj-expired
Changed in linux (Ubuntu):
status: Incomplete → Expired
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