Re: alsamixer muting when restoring from suspend.

[Pavel Machek <pavel@suse.cz>]

Hi!

> > > > This I think is not a problem but rather a subtle bug.
> > > > 
> > > > Alsamixer by default mutes all channels when loaded.
> > > > So when I `swsusp' my comp while I listen to music and restore the music
> > > > plays from where it left alright, but the channels are muted.
> > > > Is there a way to unmute them implicitly when restoring.
> > > 
> > > which driver?
> > > not all drivers have suspend/resume callbacks.
> > 
> > Could it be solved at higher layer, perhaps? Setting volume is common
> > to all drivers, and some kind of generic_alsa_suspend every alsa
> > driver would call might help...
> 
> the problem is also that you need to reinitialize the chip after
> resume.  the restoration of mixer config could be done by calling
> "alsactl store" at the suspend and "alsactl restore" at the resume in
> the user space.  can apmd work for such a purpose even for software
> suspend?

Userspace should not be involved in suspend/resume. Having in-kernel
equivalent of alsactl store / alsactl restore might help alsa driver
authors... And might be enough for suspend-to-disk to +/- work. (Well,
unless sound was playing when user requested suspend, that one needs
proper support).

								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]