Cutting desktop power usage

Posted by steevc on Ask Ubuntu See other posts from Ask Ubuntu or by steevc
Published on 2011-01-30T21:20:59Z Indexed on 2011/01/30 23:33 UTC
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10.10

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power-management

I'm on a general energy saving mission. I've finally swapped my old CRT monitor for a LCD, so the next step it to optimise the PC power usage. It's using an AMD 64 X2 4600+ CPU which I know can trottle down, but seems to be running at a constant 2.4GHz.

A while back I heard about Granola. I've installed it, but when I try to run it I get

granola[10568]: Error opening scaling governor file '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor' in read mode
granola[10568]: Is cpufreq enabled in this kernel and do you have a CPU which supports DVFS?
granola[10568]: Can't manage DVFS for any CPUs

I'm happy to use other applications if Granola is not optimal or viable.

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