org.freedesktop.PowerManagement

[Holger Macht]

On Fri 30. Mar - 13:36:58, Rodrigo Moya wrote:
> On Fri, 2007-03-30 at 13:01 +0200, Holger Macht wrote:
> > On Fri 30. Mar - 13:04:45, Rodrigo Moya wrote:
> > > On Thu, 2007-03-29 at 20:42 +0200, Holger Macht wrote:
> > > > 
> > > > I actually wonder why nobody else from the desktop people comment on
> > > > this. I also wonder why this problem with shutdown and reboot didn't came
> > > > up before and got defined somewhere else in the past. They seem important
> > > > to me ;-) This should be of interest all desktops. I see three
> > > > possibilities here:
> > > > 
> > > >  1. Either we keep shutdown and reboot mandatory like the other o.f.pm
> > > >     methods, then all desktops have to make sure that _all_ those methods
> > > >     are actually always implemented in the desktop session no matter of
> > > >     any power management application. At least they have to return
> > > >     NotSupported or the like.
> > > > 
> > > >  2. We all, desktop and power management people, agree that a power
> > > >     management application is compulsory in every desktop session.
> > > > 
> > > >  3. We and/or the desktop people define those two methods somewhere else
> > > >     to be mandatory. This way we could leave them optional in the o.f.pm
> > > >     spec application. This would be my preference.
> > > > 
> > > > Something else? What do you say?
> > > > 
> > > I think Shutdown and Reboot are power management operations, so they
> > > make sense in the o.f.pm interface, so I would vote for having them
> > > mandatory and the others optional, so that every desktop can implement
> > > what they want/can
> > 
> > Would make sense. So every desktop has to provide
> > org.freedesktop.PowerManagement. As soon as there is a smarter
> > application, it can grab the interface and can provide additional ones
> > (Suspend(), ...). But it would still only forward it to the desktop
> > itself.
> > 
> > Currently we are limited by the fact that different methods on the same
> > interface can't be handled by different services. Any way so solve this?
> > 
> but we can have different services implementing the same methods, so I
> guess we could have some form of capabilities or something:
> 
> 	enum Capabilities {
> 		BASIC = 0x01
> 		SUSPEND = 0x02
> 		HIBERNATE = 0x04
> 		etc }
> 	Capabilities getCapabilities ();
> 	bool hasCapabilities (Capabilities cap)
> 
> so that apps could ask the different implementations what they support
> and use the ones they need.
> 
> Not sure if that's what you meant

Not explicitly. I'm definitely for having Shutdown() and Reboot() on the
org.freedesktop.PowerManagement interface because it fits there. But what
I would like most is that org.freedesktop.PowerManagement.Shutdown() will
be handled by the desktop base and
org.freedesktop.PowerManagement.Suspend() by gnome-power-manager.

Regards,
	Holger