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Let's start with a brief introduction:
* In my case, lid-closures do not result in a kernel panic anymore since these
lines were added to /etc/init.d/hotkey-setup:
39 for x in /proc/acpi/video/*/DOS; do
40 if [ -e "$x" ]; then
41 echo -n 7 >$x;
42 fi
43 done
This patch was made in hotkey-setup 0.1-22. The package "hotkey-setup" is a
dependency for the meta-package "ubuntu-desktop" (not for "ubuntu-standard" or
"ubuntu-minimal"). IMHO the patch to "hotkey-setup" should be considered as a
workaround, not as a bugfix.
* There could be a relation between #157691 and #228399
* The panic isn't triggered when SMP is disabled
(sudo sh -c 'echo 0 > /sys/devices/system/cpu/cpu1/online')
Enough introduction :) ..
* I've commented out lines 39-43 in /etc/init.d/hotkey-setup and
rebooted.
* I'm running cutting-edge Jaunty:
$ uname -a
Linux workmate 2.6.28-8-generic #26-Ubuntu SMP
Wed Feb 25 04:27:53 UTC 2009 x86_64 GNU/Linux
* By default, the DOS setting is "0":
$ cat /proc/acpi/video/C098/DOS
DOS setting: <0>
Attached you'll find a picture containing the last couple of lines of the
"oops", right after I've closed the lid.
I hope the picture and the information I provided contain enough information to
work on this bug. I really really have a lack of time, else I would have made a
new picture because this one is a bit vague. Maybe someone else can try to
reproduce the bug with netconsole running
(https://wiki.ubuntu.com/KernelTeam/Netconsole) or when booted from a vanilla
kernel (https://wiki.ubuntu.com/KernelMainlineBuilds).
HTH
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** Attachment added: "jaunty-panic-2.6.28-8.jpg"
http://launchpadlibrarian.net/23312882/jaunty-panic-2.6.28-8.jpg
--
Closing lid results in kernel panic
https://bugs.launchpad.net/bugs/228399
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