ACPI Throttling in Ubuntu

Posted by Evan on Super User See other posts from Super User or by Evan
Published on 2009-12-09T20:46:24Z Indexed on 2010/04/21 9:54 UTC
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Filed under:

ubuntu

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acpi

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cpu

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Throttling

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speed

I'm looking to throttle my cpu through the ACPI. I've read up on it, but I keep receiving permission denied statements. I have 8 available throttling states. Here are the outcomes of my atttempts:

evan@evan-laptop:/proc/acpi/processor/CPU0$ echo 3 > /proc/acpi/processor/CPU0/throttling

bash: /proc/acpi/processor/CPU0/throttling: Permission denied

evan@evan-laptop:/proc/acpi/processor/CPU0$ sudo echo 3 > /proc/acpi/processor/CPU0/throttling

bash: /proc/acpi/processor/CPU0/throttling: Permission denied

EDIT: For reference, I am running Ubuntu Karmic with Intel Core Duo T2500 with ACPI enabled

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