Re: [linux-pm] Runtime PM discussion notes

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Hi!

> > Well, auto suspending when screensaver is active would still be
> > useful.
> > 
> > (And IIRC some machines kept screen on when in S-state unless driver
> > powered it down... but that might be S1.
> > 
> > > The reason why you can't enter ACPI S-states from CPUidle is because you
> > > need to go out of the idle loop to execute some ACPI-specific stuff.  Which
> > > is not even specific to Intel chips, but to ACPI in general.
> > 
> > The code was little tricky/unclean, but it "worked" for me at one
> > point... I called it  "sleepy linux".
> 
> Yes, you can find a system where it might kind of work (just because
> _PTS is empty or something like this).  Is it going to work in general?
> No way.

IIRC I solved it by just calling _PTS when sleepy Linux was
enabled. It had side effect of lighting up moon icon, but otherwise
seemed to work ok.

I do not think ACPI says what can and can not be done after _PTS...


									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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