org.freedesktop.PowerManagement

[Richard Hughes]

On Tue, 2007-03-27 at 13:02 +0200, Danny Kukawka wrote:
> On Dienstag, 27. März 2007, Richard Hughes wrote:
> > On Tue, 2007-03-27 at 12:43 +0200, Danny Kukawka wrote:
> > > You can't say clearly IIRC if something get saved to RAM, because this
> > > get normaly handled by the bios and depend on the bios implementation. I
> > > have seen machines which show the same behavior on Standby as on
> > > suspend-to-ram.
> >
> > Sure, but what I've described is the common case, no?
> 
> IIRC there is no common case. At least everything is in RAM in the most cases, 
> because the processes on the machines get not really stopped. The point is 
> you can't never say what S1 do. I don't know atm if there general description 
> for S1. 
> 
> Maybe this would be a better description:
> 
> "Standby is the action where the CPU is held in a low power state, the display 
> get shut down but no data is saved to hard disk. The behavior of Standby 
> depends on your bios and hardware. It normally takes a a split second to 
> standby and resume. You cannot remove the battery when on laptop power or 
> work will be lost."

I've added something like this, thanks.

> > > > Standard Nomenclature
> > > > This section describes the standard nomenclature that should be used by
> > > > programmers when implementing the Power Management Specification.
> > > >
> > > > Standby
> > >
> > > If you provide information about Standby, why are there no functions on
> > > the interface to call Standby (Standby/CanStandby/CanStandbyChanged/)? I
> > > know HAL don't provide a interface by default, but there are (maybe old)
> > > machines which support no suspend-to-ram but work with Standby.
> >
> > Valid point. Either we can add the standby stuff to the spec, or I can
> > drop the standby description. kpowersaved uses standby doesn't it?
> 
> KPowersave provide Standby trigger (if supported by the system and HAL ... see 
> my patch for HAL on the ML) and there are user which use it as bugreports 
> show.

Sure. I'll add it to the spec for completeness if you want. For stuff
like gnome-power-manager it will be a stub, unless the HAL stuff gets
upstream.

Richard.