Random restart instead shutdown and power off in bios

Dear all,
since some time my Thinkpad T410 randomly restarts instead doing a requested shutdown. Also there is a random power off while POST when I power on the system (I not noticed any relationship between both problems except the date since they occur - maybe a system update, but I'm not sure).
I'm running Linux 3.1.2-1-ARCH with thinkpad-acpi kernel module and laptop-mode enabled.
I also tried Windows and Ubuntu to assure that this problem is not hardware related and I never experienced the problems with both tested OS's.
Has anybody experienced similar problems or a clue where to start looking for problems?
Cheers,
Martin
Last edited by schappi (2011-11-28 19:29:24)

By now, i think i solved the problem with a clean arch installation. I know, it's overkill, but I can't figure out the cause of the randomly appearing problem.
@albLinux: If you have this problem when rebooting each time, try google or have a look here:
https://bbs.archlinux.org/viewtopic.php?pid=1023970
cheers

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