Re: Powerbook produces a lot more heat after kernel upgrade

[Joerg Sommer <joerg@alea.gnuu.de>]

Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> On Tue, 2004-11-30 at 14:02 +0100, Richard Hult wrote:
>> Timo Reimerdes wrote:
>> > Could is be something related to hard-drive activity? Or is the
>> > processor just doing more work? did the powernowd change?
>> 
>> This is without running any frequency scaling at all (no powernod, 
>> cpydyn, or cpufreqd), and also without spinning down the hard drive. 
>> It's a bit of a mystery to me, I looked through the changelog for the 
>> kernel between 2.6.7 and 2.6.8 and didn't find anything obviously 
>> related to something like this.
>
> Note that a good way to lower the power consumption of a Mac laptop is
> to reduce HZ back from 1000 to 100 in include/asm-ppc/param.h

Is this possible at runtime?

Jörg.

-- 
Thema: Der FSR bringt die Evalusationshefte erst ein Semester nach der
Evaluation raus.
Prof: Was will man auch von Leuten erwarten, die für ihre Arbeit nicht
bezahlt werden.