Arch Linux

cougar

Member

From: France

Registered: 2006-06-24

Posts: 93

Speedstep Problem

Hello,

I'm trying to configure frequency scaling on my IBM T43. I did everything like in the wiki but it's not working as it should !

When I'm on battery, and whatever the gouvernor, the frequency is set to 800 Mhz, the lowest available.
I can't set it manually:

[root@Avalon cpufreq]# cat scaling_max_freq 
800000
[root@Avalon cpufreq]# echo -n 1733000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
[root@Avalon cpufreq]# cat scaling_max_freq 
800000

When I'm on AC, frequency scaling works well and I can set the highest freq...

How can I fix this ?

Thanks

plut0nium

Member

From: Mons, Belgium

Registered: 2007-01-18

Posts: 18

Website

Re: Speedstep Problem

do you have cpufreqd running ?

---

Without evil there can be no good, so it must be good to be evil sometimes...

cougar

Member

From: France

Registered: 2006-06-24

Posts: 93

Re: Speedstep Problem

No, the only running daemon is "cpufreq".

Last edited by cougar (2007-04-20 16:44:12)

zeus

Member

From: Korolev / Russia

Registered: 2006-09-19

Posts: 117

Website

Re: Speedstep Problem

stop cpufreqd if you want to configure it manually.
you can use "cpufreq-set -g <mode>"
where mode:
ondemand
powersave
performance

also you can use acpi for automatic regulation:

$ cat /etc/acpi/actions/lm_ac_adapter.sh
#!/bin/bash
if grep -q on-line /proc/acpi/ac_adapter/AC/state
  then cpufreq-set performance
  else cpufreq-set ondemand
fi