From: Tom Bruno <crweb@vwords.com>
To: cpufreq@www.linux.org.uk
Subject: cpu won't stay in powersave mode
Date: Mon, 15 Dec 2003 01:17:25 +0000 [thread overview]
Message-ID: <1071451044.4757.9.camel@localhost> (raw)
I'm in the process of writing an acpi daemon that will also take care of
cpufreq settings.
I have found that unless I set
/sys/device/system/cpu/cpu0/cpfreq/scaling_governer
to powersave from the command line that /proc/cpuinfo will not change
and the speed will not stay at powersave speeds.
With other programs like cpufreqd, using a cpu speed test posted on this
list, i have found that the cpu speed does indeed change even though
/proc/cpuinfo does not.
However, i have found that after about 8-10 seconds the cpu test starts
reporting that the cpu is back to full speed even though the powersave
value is still in scaling_governer.
Like i said above if I change it via hand using echo, /proc/cpuinfo is
correct, and the cputest reports the correct speed constantly.
performance mode: 2.4ghz
powersave mode: 1.2ghz
Intel P4-M 2.4ghz
Dell Inspiron 8500 - Bios A05
kernel-2.6.0-test11
--
Vwords.com Technology Services
PC and Network Services for Southern Illinois
Phone: 618-713-6896
next reply other threads:[~2003-12-15 1:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-15 1:17 Tom Bruno [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-12-15 15:18 cpu won't stay in powersave mode Tom Bruno
2003-12-19 16:15 ` Dominik Brodowski
2003-12-20 17:21 ` Tom Bruno
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