老笔记本安装xubuntu14.04 cpu频率被卡死在1000MHz 怎么设置都改不了。。。。

[Eanno]

#cpufreq-info

cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to [email protected], please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.67 GHz
available frequency steps: 1.67 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 1000 MHz and 1000 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1000 MHz.
cpufreq stats: 1.67 GHz:0.00%, 1.33 GHz:0.00%, 1000 MHz:100.00% (1)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.67 GHz
available frequency steps: 1.67 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 1000 MHz and 1000 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1000 MHz.
cpufreq stats: 1.67 GHz:0.00%, 1.33 GHz:0.00%, 1000 MHz:100.00%

设置过conservative ondemand 各种模式 可是频率一直是1000MHz 从来不变
后来发现info中这句非常诡异： frequency should be within 1000 MHz and 1000 MHz.
请问大家 怎么解决？？

[taohunter]

参考：
http://ubuntuforums.org/archive/index.p ... 90143.html
https://wiki.debian.org/HowTo/CpuFrequencyScaling

应该是acpi节电模式未能正确自动配置引起的。修改系统文件前先备份并注意权限。