What service can hold CPU at lowest frequency possible when on battery load under Ubuntu?

Posted by vava on Super User See other posts from Super User or by vava
Published on 2009-09-05T13:29:39Z Indexed on 2010/04/22 6:33 UTC
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ubuntu

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Performance

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cpu

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speed

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Throttling

When I'm running on battery even with "performance" frequency scaling governor, something regularly lowers CPU speed to it's lowest value. I don't really want that, my AC strip usually in another room so I don't really need to save power. How can I find what service doing that?

laptop_mode is disabled so that's not it.

Update: Looks like CPU being scaled down only if it is under load. If it is more or less idle, it could stay on any frequency pretty much forever, but once it gets loaded, it quickly jumps to it's lowest frequency.

Another update: Something sets maximum frequency CPU can have.

Ubuntu launchpad bug 242006

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