Re: Debian on the Desktop - plans for Lenny?

[Petter Reinholdtsen <pere@hungry.com>]

[Wouter Verhelst]
> Except that a PowerPC processor (as found in Gustavo's ibook) simply
> doesn't *have* C states. On my PowerBook G4, I noticed that when I
> started running this crude hack[0]...
>
> ------
> #!/bin/bash
>
> modprobe cpufreq_userspace
> echo $$ > /var/run/mycpufreqd
> echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

I suspect you will get almost the same behavior by using this hack and
leaving it to the kernel to scale it:

  #!/bin/bash
 
  modprobe cpufreq_userspace
  echo $$ > /var/run/mycpufreqd
  echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

It will jump to the highest frequency when the load is high, and drop
to the lowest frequency when there is less load.

See for example
<URL: http://www.mjmwired.net/kernel/Documentation/cpu-freq/governors.txt >
for documentation on the various governors.

Happy hacking,
-- 
Petter Reinholdtsen