cpupower followup: I installed cpupower but a short test for me didn't work .. 1) ls /sys/devices/system/cpu/cpufreqy Is empty .. 2) cpupower -c 0 frequency-set -g ondemand Setting cpu: 0 Error setting new values. Common errors: - Do you have proper administration rights? (super-user?) - Is the governor you requested available and modprobed? - Trying to set an invalid policy? - Trying to set a specific frequency, but userspace governor is not available, for example because of hardware which cannot be set to a specific frequency or because the userspace governor isn't loaded? I need to read more ... to get the right driver installed first I guess.