speedstepping, set to depend on power source?

[stm]

i'm currently trying to get the speedstepping to work the way i want, meaning:

- running on battery: 600 mhz, speed up if needed
- running on ac: max cpu speed all the way

how do i achieve this? i tried with speedfreqd, but as far as i see there's no way for excactly what i want.

regards
stm

[yaneurabeya]

I believe you have to also have ACPI or APM support in your kernel, but there should be some documentation lying around about how to set it up properly.

[Archangel1]

Speedfreq seemed to work okay for me at first, but when I've checked recently it hasn't been winding up again when on power.

I've had a quick play and I seem to have solved it (although it'll probably break again in a few months) - running speedfreq -p performance when it goes on AC power, and speedfreq -p dynamic when off.
I dumped those lines in /etc/acpi/default.sh along with the other stuff in there; it should take care of everything for me.

If you prefer a more graphical route (and use KDE) KLaptopDaemon is capable of a similar trick, although I prefer not to use a utility that's only running in onde DE - and I think the speedfreq one is a better solution anyway.
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What are you, stupid?

[stm]

ye, i do have acpi and apm support in my kernel.

the mentioned lines about speedfreq -p look like a good start, i'll give that a try, thanks!