On Sat, 2009-09-05 at 16:31 +0800, Aubrey Li wrote:
> On Sat, Sep 5, 2009 at 10:59 AM, Sebastien Roy<[email protected]> wrote:
> > On Sat, 2009-09-05 at 10:38 +0800, Aubrey Li wrote:
> >  I wonder what changed.
> 
> to put this simply, the default mode is event driving, which makes the p-state
> transition decision by several sampling points. It's more aggressive.
> 
> "poll-mode" makes the transition decision by a tunable sampling period. The
> period is 1s on your system (cpu-threshold 1s). It's more stable.

Hmm, is it then possible that when event driven mode is used, powertop
simply can't observe the lower p-states because of its probe effect?

> > and if the suspend failures are related.
> >  It looks like the system will only suspend if it's at the lowest P-state...
> >
> I'm not suspend/resume expert, you can post this question on pm-discuss
> mailing list.

I will, thanks for the info.

-Seb


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