Re: Powerbook produces a lot more heat after kernel upgrade
- To: Benjamin Herrenschmidt <firstname.lastname@example.org>
- Subject: Re: Powerbook produces a lot more heat after kernel upgrade
- From: Wouter Lueks <email@example.com>
- Date: Wed, 1 Dec 2004 20:43:13 +0100
- Message-id: <20041201194313.GC1370@planck.telox.net>
- In-reply-to: <1101854379.5225.12.camel@gaston>
- References: <4195CC6F.firstname.lastname@example.org> <1100998508.3796.57.camel@gaston> <email@example.com> <20041126123314.4ce4e013@pirandello> <41AB1F97.firstname.lastname@example.org> <email@example.com> <41AC6F67.firstname.lastname@example.org> <1101854379.5225.12.camel@gaston>
On Wed, Dec 01, 2004 at 09:39:39AM +1100, Benjamin Herrenschmidt 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
As it isn't standard set to 100, there must be some side-effects, could
you describe them?