> > I read about autospeedstep, and installed it. It compiled well,
> > and runs well, and /var/log/speedstep indicates that it changes
> > betrwwn powersave and full power, but i don't quite trust it :
>
> speedstep has nothing to do with throttling. Speedstep changes the
> cpu clock rate between two frequencies, throttling stops the cpu
> for some time by stopping the clock signal at all.
> So you may have to look at /proc/cpuinfo, I don't have a speedstep
> capable processor, so I cannot check this.

You can manually change the throttling with something like:

echo 5 > /proc/acpi/xxxxx/throttle

It works fine on my Asus L3800S (P4).  If I want to get a good battery
life, I dim the display, and set throttle to 5 or 6 (out of a range of
0..7, where 0=fast).  I haven't measured the effect, but I think it
extends battery life by 1/3 at least.

The P4 in my Asus also does not have speedstep (according to the
kernel, when I enabled speedstep in the kernel config).

Gwen.


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