RE: cpufreq: powernow-k8 frequency transitions question

[Gunter Ohrner <G.Ohrner@post.rwth-aachen.de>]

Devriendt, Paul wrote:
> Transitions between low frequencies (<=1.4GHz) are not supported by
> hardware. The way to do them is to transition to an intermediate
> high frequency.

Yes, I read about that in the PDF I referred to. I guess that#s the guide
you also mentioned?

> No BIOSs define two low PStates so the case never occurs, but it could
> theoretically be done. 

I'm currently experimenting with the speeds my CPU can run at. (Out of spec,
at lower frequencies and voltages to safe a few watts and keep everything
cool'n'quiet, so to say... ;)

It seems to run fine a several low pstates, I just need to check if
supporting low-low-transitions would be worth the hassle, or if I just
limit my pstate table to two pstates between which the CPU can transition
directly.

Thanks a lot for your answer,

  Gunter

-- 
Thunder rolled. ... It rolled a six.        -- (Terry Pratchett, 
Guards! Guards!)
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