[SOLVED] No cpu frequency scaling possible

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http://ubuntuforums.org – Hi, I've upgraded to Ubuntu 11.04 and cannot set the cpu speed anymore. It was working with the previous Ubuntu version. I have a C2D T8300 which is always set to the highest speed (2.4GHz) even though the governor is set to 'ondemand'. I tried to set the speed to 800MHz (which is a valid frequency) with cpufreq-set -f 800000 without success. Code: echo 800000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed doesn't work too. Setting different governors is no problem, but doesn't change the freqency. Is anyone else having this strange behaviour? I tried kernel 2.6.35-29-gene (Hardware)