power managing maestro.c 0.14 available.

[Jamie Lokier]

Zach Brown wrote:
> > (a) could be made a bit better by turning the power off completely when
> > the input mixer levels are zeroed.
> 
> s/input//, but yeah.

If /dev/dsp is closed, and all the input mixers are zeroed, and all the
outputs are at max volume...  there still isn't any sound.

So you can turn off the power.

[Cc to CD driver maintainers:]

It might be nice to add a notifier chain specifically for CD drivers to
say when they're playing something and when they're not.  Something very
simple: notify when audio playing starts, notify when audio playing
stops.  Perhaps volume changes too.

The CD/audio mixer interaction is very common, and with laptops we
really do want subsystems to shut down when not in use.

thanks,
-- Jamie

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