Detlef Drewanz wrote:

 - I also tried during runtime to change
> between poll-mode and event-mode with editing power.conf and
> pmconfig. But this didn't changed anything. - Yesterday I had a
> longer trip by train and played during that time with dtrace, but
> also didn't got any probe-fire to change cpu-speeds. 
> 

I'll be surprised if this configuration can't slow the frequency down to
the lowest one.

1) add to /etc/power.conf
========
cpupm                   enable  poll-mode
cpu-threshold           1s
========
2) pfexec pmconfig

powertop should show 100% residency in the lowest frequency when idle.

-Aubrey

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