Mailinglist Archive: opensuse-mobile (23 mails)

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Re: [opensuse-mobile] IBM R50e and CPU-frequeny
  • From: Rainer Krienke <krienke@xxxxxxxxxxxxxx>
  • Date: Mon, 12 Nov 2007 11:22:05 +0100
  • Message-id: <200711121122.05408.krienke@xxxxxxxxxxxxxx>
Am Freitag, 9. November 2007 14:11:48 schrieb Stefan Seyfried:
On Fri, Nov 09, 2007 at 01:27:54PM +0100, Rainer Krienke wrote:
Hello,

I have an IBM R50 E with a Intel Celeron 1.4 Ghz processor installed with
10.3. Recently I discovered that simply loading the module p4_clockmod
scales down the CPU-frequency to about 170MHZ and as needed scales the
freq up. This helps saving battery power.

No it doesn't. Celerons don't have CPU frequency scaling. p4_clockmod only
has duty cycle modulation (the same as throttling) which does not save
any power.

Thanks, I found the settings I was searching for but since the CPU does not
save any power this exercise is of course in vain.

Thanks
Rainer
--
Rainer Krienke, Uni Koblenz, Rechenzentrum, A22, Universitaetsstrasse 1
56070 Koblenz, Web: http://www.uni-koblenz.de/~krienke, Tel: +49261287 1312
PGP: http://www.uni-koblenz.de/~krienke/mypgp.html, Fax: +49261287 1001312
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