It occurred to me that Robert Cates wrote in gmane.os.netbsd.ports.i386:

> Drivers for AMD's Cool 'n' quiet?  I thought that would be something 
> controlled by the CPU/BIOS, and not software.(?)

http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_9706,00.html

Linux driver (in source) available; GPL license.

-- 
    Martijn van Buul - pino@dohd.org - http://www.stack.nl/~martijnb/
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 The most exciting phrase to hear in science, the one that heralds new
discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...' Isaac Asimov