Изменение частоты процессора

[JohnDoe]

acpitool --cpu

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acpitool --cpu
  CPU type               : AMD Athlon(tm) II X3 435 Processor
  Min/Max frequency      : 800/2900 MHz
  Current frequency      : 800 MHz
  Frequency governor     : ondemand
  Freq. scaling driver   : powernow-k8
  Cache size             : 800.000 KB
  Bogomips               : 5825.97
  Bogomips               : 5825.97
  Bogomips               : 5825.97
  Function Show_CPU_Info : could not read directory /proc/acpi/processor/
  Make sure your kernel has ACPI processor support enabled.

cpufreq-info

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cpufreq-info
cpufrequtils 006: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 14.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 2.90 GHz.
  cpufreq stats: 2.90 GHz:10,18%, 2.20 GHz:0,33%, 1.70 GHz:1,54%, 800 MHz:87,95%  (16149)
analyzing CPU 1:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 14.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.
  cpufreq stats: 2.90 GHz:17,59%, 2.20 GHz:0,38%, 1.70 GHz:1,87%, 800 MHz:80,17%  (16197)
analyzing CPU 2:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 2
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency: 14.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.
  cpufreq stats: 2.90 GHz:16,34%, 2.20 GHz:0,47%, 1.70 GHz:1,79%, 800 MHz:81,40%  (16308)

Суть проблемы что после перезагрузки значение в /sys/devices/system/cpu/cpuX/cpufreq/scaling_min_freq
равно /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq

Пока выкрутился, добавив изменение scaling_min_freq в rc.local. Но непонятно почему сбрасывается на максимальное. Ubuntu 10.04