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SubjectRe: Possible bug in eeepc-laptop.c - EeePC 900
On Tue, Mar 9, 2010 at 11:58 PM, Fabio Comolli <> wrote:
> Hi.
> I have an EeePC 900 running 2.6.34-rc1.
> If I boot it on AC the cpu runs at full speed, 900MHz; if I boot it on
> battery it runs only at 630Mhz. Plugging / unplugging the AC does not
> change the cpu frequency. Only a reboot can change the situation.
> I already tried to echo 0 or 1 to the
> /sys/devices/platform/eeepc/cpufv file; no effects, even if the file
> changes its value.
> This is not a regression from 2.6.33: this behavior is also present in
> that version.
> Does this ring any bells? This is really annoying, especially when
> trying to watch a movie on battery. Also 3D apps show a 30%
> performance drop, as expected.

Can you change the frequency with cpufreq ?
Did you try all cpufv values (see cpufv_available file) ?
Is you bios up-to-date ?

Corentin Chary

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