More advanced power savings (rev. the DPMS extension).

[Egbert Eich]

Alex Deucher writes:
 > >
 > > Your case is rather special (at least for today's hardware).
 > > I'm not convinced that adding this to DPMS is the way to go.
 > > Depending on what you need (see above) you may want to create
 > > a new extension. Apps can check if it is there and don't get
 > > confused by the presence of DPMS but the absense of these
 > > special features.
 > 
 > some of the silicon motion chips have a similar mode.  It'd be nice to
 > design an extension where we can dynamically change this since, at
 > least on silicon motion, you have to disable the overlay, DAC, and
 > some other features to enable the low power idle mode.
 > 

In case of the silicon motion it would not keep the screen running.
In this case the powerdown could actually happen on a DPMS event.
I think a lot of mobile device chipsets have power save features
and also some parts of the desktop chips can be disabled when not
in use. We just have to learn how.

Cheers,
	Egbert.