установил apt-get install cpufrequtils
потом
запускаю cpufreq-info
вот что говорит
root@ddr3-desktop:~# cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
у меня amd x2 4800