* - Tong - mlist4suntong@yahoo.com [20070801 06:15]:
On Tue, 31 Jul 2007 08:47:32 +0200, Michael Prokop wrote:
To check your current settings regarding cpu frequency scaling check output of 'cpufreq-info'...
% cpufreq-info cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006 Report errors and bugs to linux@brodo.de, please. analyzing CPU 0: no or unknown cpufreq driver is active on this CPU
Ok, so you don't have any drivers loaded.
,----- | If cpufreq quits with an error message, you should first re-check that you | have the correct cpufreq driver. `-----
So, what cpufreq driver should I use?
See below.
Is the 'thermal' kernel module loaded on your system?
% insmod thermal insmod: can't read 'thermal': No such file or directory
# modprobe thermal
$ dmesg | grep ^CPU0 CPU0: AMD Athlon(tm) 64 Processor 2800+ stepping 0a
,----- | If you intend to use a kernel compiled with these features, you should use | dmesg | grep cpufreq to check if the kernel was able to initialize the | feature. `-----
% dmesg | grep cpufreq || echo no found no found
Sure, because no appropriate driver is loaded.
$ uname -rm 2.6.20-grml i686
Check CPU temperature using tools like sensors/mbmon (depending of your hardware whether what's supported of course).
How would I know if my hardware is supported or not?
What does:
source /usr/bin/cpufreq-detect.sh echo $MODULE
report on your system? Try to load the $MODULE via 'modprobe $MODULE' then, does cpufreq-info report anything then?
BTW, anybody know the 'conservative' governor?
Yes. ;) But I usually prefer the ondemand governor. Check /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor for current settings as soon as cpufreq is working.
regards, -mika-