Undervolting Thinkpad A31p (P4m, 2Ghz)

Hello,
now that I have managed to get Arch working on my new/old A31p I tried to get undervolting to work in order to reduce fan noise and temperature (fan cleaned, tpfand working, temperature while surfing ~53°).
- Recent kernel does not include the phc-patch, right?
- Installed acpi-cpufreq-phc from AUR
- rmmod acpi-cpufreq
- modprobe acpi-cpufreq (tried rebooting, too) -> acpi-cpufreq is loaded
Now all the phc_ - files show up in /sys/devices/system/cpu/cpu0/cpufreq but I am not able to read values from those files or to even write to phc_vids.
Searched the web for a solution but did not have any success, read about checking the DSDT - which compiles without a error. Any idea?
Help would be greatly appreciated.
Last edited by cywhale (2008-11-20 15:19:25)

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