[Bug 605440] Re: BUG: unable to handle kernel NULL pointer dereference at 00000008
Geir Ove Myhr
605440 at bugs.launchpad.net
Fri Jul 16 07:21:07 UTC 2010
I thought 2.6.35-6.8 and other -rc3 based kernels were safe, but now I
got a oops from -6.8 too. dmesg is attached. Unlike with 2.6.35-7, xorg
works fine after this one, and I wouldn't have noticed it if I were not
checking dmesg output or see the apport crash indicator.
** Attachment added: "dmesg-2.6.35-6.txt"
** Description changed:
This bug may be the underlying problem of bug 605124, which I have
reported upstream as https://bugs.freedesktop.org/show_bug.cgi?id=29048
. I had written some more relevant information here, but I was struck by
bug 553946 for the second time today, and can't remember what it was :-(
I have tried several kernels, but it is hard to say anything for sure,
since the frequency of this problem varies with kernel build and
possibly the mood of ureadahead (i.e. how fast it is able to make the
2.6.35-7: Where I initially had the problem. Sometimes I only get this oops message in the dmesg output and everything else works fine, but often I get an the oops from bug 605124 and Xorg starts in low-graphics mode.
- 2.6.35-6: I have booted this 3-4 times and haven't had any problems yet.
+ 2.6.35-6: I have had this oops once now with this kernel. See comment #2.
2.6.35-rc5 (mainline build): I get this oops every now and then, but it does not affect Xorg or anything else as far as I can see.
2.6.35-rc4 (mainline build): I get this oops every now and then, but it does not affect Xorg or anything else as far as I can see. The laptop keyboard and pointer does not work with this build, but USB mouse and keyboard does.
2.6.35-rc3 (mainline build): I have tried to trigger the problem here several times without success. ureadahead sayd it would reprofile on next boot when I installed this, but it always returned exit status 5 on boot with this kernel, which may mean the boots were slower.
2010-06-15 mainline build: I have tried to trigger the problem here several times without success, but I alternated with -rc5 for comparison and in 8 boots on each, none of them had problems.
2010-06-30 mainline build: Like -rc4, laptop keyboard doesn't work and at this time I didn't have an external keyboard available.
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-7-generic 2.6.35-7.12
ProcVersionSignature: Ubuntu 2.6.35-7.12-generic 2.6.35-rc4
Uname: Linux 2.6.35-7-generic i686
AcpiTables: Error: [Errno 13] Permission denied
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
- **** List of CAPTURE Hardware Devices ****
- card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
- Subdevices: 2/2
- Subdevice #0: subdevice #0
- Subdevice #1: subdevice #1
+ **** List of CAPTURE Hardware Devices ****
+ card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
+ Subdevices: 2/2
+ Subdevice #0: subdevice #0
+ Subdevice #1: subdevice #1
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: gom 1456 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: gom 1456 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
- Card hw:0 'Intel'/'HDA Intel at 0xf8220000 irq 46'
- Mixer name : 'Analog Devices AD1984'
- Components : 'HDA:11d41984,17aa20dd,00100400'
- Controls : 31
- Simple ctrls : 19
+ Card hw:0 'Intel'/'HDA Intel at 0xf8220000 irq 46'
+ Mixer name : 'Analog Devices AD1984'
+ Components : 'HDA:11d41984,17aa20dd,00100400'
+ Controls : 31
+ Simple ctrls : 19
- Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7RHT16WW-1.02'
- Mixer name : 'ThinkPad EC 7RHT16WW-1.02'
- Components : ''
- Controls : 1
- Simple ctrls : 1
+ Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7RHT16WW-1.02'
+ Mixer name : 'ThinkPad EC 7RHT16WW-1.02'
+ Components : ''
+ Controls : 1
+ Simple ctrls : 1
- Simple mixer control 'Console',0
- Capabilities: pswitch pswitch-joined penum
- Playback channels: Mono
- Mono: Playback [on]
+ Simple mixer control 'Console',0
+ Capabilities: pswitch pswitch-joined penum
+ Playback channels: Mono
+ Mono: Playback [on]
Date: Wed Jul 14 15:45:18 2010
Frequency: Once a day.
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100630.2)
MachineType: LENOVO 7764CTO
- Socket 0:
- no product info available
+ Socket 0:
+ no product info available
- Socket 0:
- no card
+ Socket 0:
+ no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-7-generic root=UUID=460f28a3-969c-409a-ab57-6070e2c7288e ro quiet splash
RelatedPackageVersions: linux-firmware 1.37
- 0: phy0: Wireless LAN
- Soft blocked: no
- Hard blocked: no
+ 0: phy0: Wireless LAN
+ Soft blocked: no
+ Hard blocked: no
Title: BUG: unable to handle kernel NULL pointer dereference at 00000008
dmi.bios.version: 7SET36WW (1.22 )
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.version: Not Available
dmi.product.version: ThinkPad X61 Tablet
BUG: unable to handle kernel NULL pointer dereference at 00000008
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux in ubuntu.
More information about the kernel-bugs