When I remove the AC adaptater the cpu throtle to 800MHz, but when I re plugged it, the CPU frequency don't go to is max ( 1800 MHz )
Is someone can help me ?
( sorry for my poor english ... )
By default (k)powersave use dynamic CPU frequency scaling. Because of this the CPUfreq does not go to maximum on AC, it go only to max if needed. But you can set the CPU frequency to max if you use kpowersave and choose 'Performance' under 'Set CPU Frequency Policy'.
but even when I set the policy to "performance" the CPU frequency is'nt set to max...
See what happen in command line :
kreg:/home/kreg # cpufreq-info -d
kreg:/home/kreg # cpufreq-info -p
800000 800000 userspace
kreg:/home/kreg # cpufreq-info -l
kreg:/home/kreg # cpufreq-set -f 1867000
kreg:/home/kreg # cpufreq-info -w -m
I don't understand why cpufreq-set doesn't work ... ( I do this under root user )
Can you say more about the machine? What kind of laptop is this? Which distribution?
it's a a dell laptop ( inspiron 9300 ) with a suse 10.0
Hm ... sound to me like a already known kerne bug. Take a look at: https://bugzilla.novell.com/show_bug.cgi?id=119836 . We had this problem currently only on DELL D600 and some other machine, but maybe your Inspiron is also effected.
Our ACPI/Kernel ppl are currently working on this problem.
and the proc is an intel centrino 1.87Ghz who can throttle to 800Mhz