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From: Hans-Peter Jansen <hpj@urpla.net>
Organization: LISA GmbH
To: Ed Sweetman <ed.sweetman@wmich.edu>
Subject: Re: [patch] amd athlon cooling on kt266/266a chipset
Date: Wed, 23 Jan 2002 21:54:57 +0100
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Cc: Daniel Nofftz <nofftz@castor.uni-trier.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Wednesday, 23. January 2002 21:29, Ed Sweetman wrote:
> On Wed, 2002-01-23 at 15:16, Hans-Peter Jansen wrote:
> > On Tuesday, 22. January 2002 18:15, Daniel Nofftz wrote:
> > > hi there!
> >
> > [...]
> >
> > > if the patch gets a good feedback, maybe it is something for the
> > > official kernel tree ?
> > >
> > > daniel
> >
> > Hi Daniel & folks,
> >
> > just tried your patch on my (diskless) asus a7v133 (kt133) with 1.2 GHz
> > Athlon. I normally had 14% base load spend in apmd-idled and a CPU temp.
> > of 45?C. After getting it to work, I see a base load of around 1% (mostly
> > spend in artsd), but CPU is only 1?-2? less now :-( I hoped, it it
> > would be more). Nevertheless, it is a very important patch nowadays where
> > temperature is the last technical barrier, and energy saving an economic
> > necessity.
> >
> > Many thanks and greetings from Berlin to Trier ;)
> >   Hans-Peter
>
> 1-2 degrees is within the sensor's deviation.   Either you dont have it
> working correctly or it doesn't work at all in your case.

It is working somehow, and the 2 degrees are significant in my case, because
the 45?C is pretty stable in unloaded state with apm enabled. Tmax is around
48?C when compiling kde, transcoding divx or the like.

As noted in another message here, I'am going back to apm because it appears
that vlc became sluggish (& back to 45?C CPU base temp. & ~15% base load
from apmd-idled, I bet :)

>
> You also need acpi idle calls, not just apm.   now this is just my guess
> but apm idle calls might either mess things up or be disabled if acpi
> idle calls are used and disconnecting the cpu... either way  you can't
> have this patch work and apm work at the same time.

I know, and I think Daniel should have noted that one have to disable APM to 
get ACPI power savings work. Would have saved me one reboot..

Cheers,
  Hans-Peter
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