Re: Re: power management in alsa

Pavel Machek
2007-07-25T18:41:50Z

Hi!

> > I noticed ALSA hda seems to only change PCI power management states
> > of the sound devices on suspend/resume. Is there a reason the device
> > cannot be automatically suspended when nobody has sound opened?
>
> I made once the automatic power-control patch for hd-audio, but it was
> possibly racy and a bit messy implementation, so I abandoned it.
> Since then, no one has worked on this issue.

IIRC that patch saved .3W, which is quite significant -- about half of
spinning harddrive. I'd say it is worth the effort.

--
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