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powernow

I've installed 64Studio on my laptop which has an AMD64 processor with powernow technology. I've installed powernowd from debian, but get an error dialog at startup saying my processor doesn't support multple frequency operation. I wouldn't mind so much, except it's stuck at the lowest frequency, not the highest. Any ideas as to why this is happening. Is the default 64Studio kernel not compiled to support this?

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I have a laptop with turion

I have a laptop with turion cpu which support 3 levels (800,1600 and 1800 mhz).

Changing cpu freq scaling with the CPU FREQ SCALING icon in the gnome panel doesnt works in 64 studio out of the box (at least not for me). Something to do with user privileges. I got it working following this guide: http://ubuntu.wordpress.com/2005/11/04/enabling-cpu-frequency-scaling

Saludos

  • By davidpucheta at 08/29/2007 - 17:27
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Kernel

Using CPU FREQ SCALING on a RT kernel is not a good idea. Jackd uses the CPU clock as a time reference, and if your pc changes the frequency by itself it causes bad xruns and audio dropout in the jacks server. If you do not use jack (unlikely, especially in 64studio) it is not a problem.

Therefore the scaling has been deactivated by default, even though it may show up in the gnome panel.

  • By Quentin Harley at 08/30/2007 - 07:07
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Its true it can cause xruns

Anyway its a good way to save power on laptops when doing any other stuff on the go. Of course when im doing audio i change the governor from "ondemand" to "performance".

  • By davidpucheta at 08/30/2007 - 15:47
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