Public bug reported:
The symptom was the 'CPU Frequency Scaling Monitor' quitting, and when
re-started, quitting again immediately.
Looking at dmesg there is a kernel NULL pointer dereference 'Oops' for
every time 'CPU Frequency Scaling Monitor' died.
Linux shim 2.6.28-12-generic #43-Ubuntu SMP Fri May 1 19:31:32 UTC 2009
x86_64 GNU/Linux
I upgraded to the 'Ubuntu Proposed' 2.6.28-12 kernel from the standard
2.6.28-11 after experiencing daily GPU lock-ups, file system errors
(auto remount read-only), and similar kernel Oops. This laptop was a
rock-solid experience with Intrepid 8.10 but is sadly an unstable mess
since upgrading to the Jaunty kernel and Jaunty Intel video driver. Wish
there was an easy way to go back to 8.10!
---------------
[10292.832256] BUG: unable to handle kernel NULL pointer dereference at
0000000000000000
[10292.832269] IP: [<0000000000000000>] 0x0
[10292.832283] PGD 0
[10292.832288] Oops: 0010 [#1] SMP
[10292.832294] last sysfs file:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
[...]
-----------------
Aaron.
ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=/dev/mapper/shim-swap
MachineType: LENOVO 2776T8M
Package: linux-image-2.6.28-12-generic 2.6.28-12.43
ProcCmdLine: root=/dev/mapper/hostname-root ro quiet splash
ProcEnviron:
PATH=(custom, user)
LANG=en_AU.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-12.43-generic
SourcePackage: linux
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
--
Kernel Oops (NULL Pointer) in 2.6.28-12
https://bugs.launchpad.net/bugs/374359
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
