Hi,
active frequency change of the processor can also be controlled using 'powernowd'.
First modprobe and then put the following in /etc/modules
p4_clockmod
cpufreq_userspace
and install powernowd
# aptitude install powernowd
The deamon will check the cpu usage every second, and changes the frequency accordingly.
Using powernowd, your laptop will be more quiet and can be used longer when disconnected to power.
Greetings Rob
--
L.V.Gandhi
http://lvgandhi.tripod.com/
linux user No.205042