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From: Bas Mevissen <ml@basmevissen.nl>
To: Jan Rychter <jan@rychter.com>
Cc: cpufreq@www.linux.org.uk
Subject: Re: Pentium-M (Centrino): no power saved?
Date: Fri, 19 Sep 2003 10:24:21 +0200	[thread overview]
Message-ID: <3F6ABD35.9070104@basmevissen.nl> (raw)
In-Reply-To: <m24qz9r0ko.fsf@tnuctip.rychter.com>

Jan Rychter wrote:
> 
> I've tried echo "0%100%powersave" > /proc/cpufreq 
>   and 
>  echo "0%50%powersave" > /proc/cpufreq
> 
> and much to my surprise, even though /proc/cpufreq echoes my changes, I
> can see no resulting changes in power consumption as reported by ACPI
> battery proc entry.
> 

The line should read echo "0%0%100%userspace" >/proc/cpufreq to get 
manal control over the speed.
Then select the speed by doing

cat /proc/sys/cpu/0/speed-min > /proc/sys/cpu/0/speed

or

cat /proc/sys/cpu/0/speed-max > /proc/sys/cpu/0/speed

powersave will only change speed when you connect or disconnect AC power.

Bas.

  reply	other threads:[~2003-09-19  8:24 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-19  2:09 Pentium-M (Centrino): no power saved? Jan Rychter
2003-09-19  8:24 ` Bas Mevissen [this message]
2003-09-19  8:36   ` Mattia Dongili
2003-09-19  9:22     ` Bas Mevissen
2003-09-19 17:15   ` Toula Michael
2003-09-19  9:23 ` Bas Mevissen
2003-09-21  6:50   ` Jan Rychter
2003-09-22  8:00     ` Bas Mevissen
2003-09-22 20:20       ` Jan Rychter
2003-09-23  8:51         ` Bas Mevissen
2003-09-19 11:46 ` Ducrot Bruno

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