Thomas, thanks a lot, will do this when being back to my machine this evening and come back with the results
greets
Su
>
> Hi Susanne,
>
> this sounds like a problem with the clocksource.
> That could be caused by powernow-k8 and cpufrequency scaling.
>
> I assume when the cpu is powered down right after startup, you see some
> messages in dmesg saying:
> ------
> Clocksource tsc unstable (delta = -107437170 ns)
> ------
>
> If so, you could try to disable cpu frequency scaling
> or make sure the system starts and runs with performance governor.
>
> cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> shows the currently used clocksource. Please post the output of that
> when booting with acpi=off and acpi enabled.
>
>
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