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DragonFly users List (threaded) for 2011-09
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powernow not working on AMD Athlon XP Mobile

From: Maurizio Lombardi <m.lombardi85@xxxxxxxxx>
Date: Sun, 11 Sep 2011 10:54:41 +0200


I installed DFly on an old laptop with an AMD Athlon XP-Mobile processor,
unfortunately I'm unable to scale down the processor frequency, it's a
problem for me because it makes the laptop to become very hot.

First of all, I tried to load the powernow kernel module:

#kldload powernow.ko

but it returns the following error: "powernow: no power states found".

#sysctl -a |grep px

hw.acpi.cpu.px_dom0.available: 1867 1463 1067 800 665 533
hw.acpi.cpu.px_dom0.members: cpu0

There are no .current and .target entries and indeed I'm unable to set
the frequency I need.
Note: frequency scaling works under FreeBSD.

Is there something I can do to solve the problem (or maybe to help a
kernel developer to find the bug)?

Please cc me because I'm not subscribed to the list.

Thanks for your help.

Maurizio Lombardi

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