More advanced power savings (rev. the DPMS extension).
alexdeucher at gmail.com
Wed Jul 26 15:13:01 PDT 2006
On 7/26/06, Egbert Eich <eich at suse.de> wrote:
> 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.
It does keep the flatpanel running, but in a sort of locked
self-refresh so you can power down the rest of the chip (ie, flatpanel
only, no DAC).
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