[SOLVED]Изменение частоты процессора

Имеется ноутбук Asus K50AB на процессоре AMD Turion RM74.
На ноутбуке установлены две системы: Ubuntu 9.10 ядро Linux 2.6.31-22-generic и Gentoo AMD64 ядро gentoo-sources 2.6.31-6.
Как в Gentoo изменять частоту процессора?
Команда cpufreq-info в Gentoo выдает следующие:

cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to , 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

Команда cpufreq-info в Ubuntu выдает следующие:

cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to , please.
analyzing CPU 0:
  driver: powernow-k8
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 550 MHz - 2.20 GHz
  available frequency steps: 2.20 GHz, 1.10 GHz, 550 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 550 MHz and 2.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 550 MHz (asserted by call to hardware).
  cpufreq stats: 2.20 GHz:10,52%, 1.10 GHz:0,57%, 550 MHz:88,91%  (2733)
analyzing CPU 1:
  driver: powernow-k8
  CPUs which need to switch frequency at the same time: 1
  hardware limits: 550 MHz - 2.20 GHz
  available frequency steps: 2.20 GHz, 1.10 GHz, 550 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 550 MHz and 2.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 550 MHz (asserted by call to hardware).
  cpufreq stats: 2.20 GHz:12,44%, 1.10 GHz:1,38%, 550 MHz:86,18%  (5084)

Какая нужна дополнительная информация?