screensaver and power manager dbus interfaces

[Rodrigo Moya]

On Fri, 2006-06-02 at 16:39 +0200, Danny Kukawka wrote:
> On Friday 02 June 2006 15:30, Rodrigo Moya wrote:
> [...]
> > > > 	Name:		setDpmsMode
> > > > 	Args:		STRING
> > > > 			value:	on		100%
> > > > 				standby		<80%
> > > > 				suspend		<30W
> > > > 				off		<8W
> > > > 	Returns:	(nothing)
> > > > 	Description:	DPMS is a standard from the VESA consortium for
> > > > 			managing the power supply of monitors.
> > > > 			This call requests a change in the state of DPMS for
> > > > 			the current screen.
> > > >
> > > > 	Name:		getDpmsMode
> > > > 	Args:		(none)
> > > > 	Returns:	STRING
> > > > 	Descriptions:	Returns the DPMS mode state.
> > > > 			See setDpmsMode().
> > >
> > > Do we really need them? We have the X extensions/functions for that.
> >
> > for the same reason I think we should add the Reboot and keep Shutdown
> > methods, I think it's better if apps use only a standard interface for
> > all power management-related tasks than having to use dbus for some
> > operations, X libs for another, etc. Of course, as you say, this is just
> > a convencience wrapper, but that would make it easier for the developer,
> > I think.
> 
> But then you need to reimplement (nearly) the complete DPMS Extension from the 
> X-Server (see www.xfree86.org/current/DPMSLib.pdf: DPMSCapable, 
> DPMSSetTimeouts, DPMSGetTimeouts, DPMSEnable/-Disable ...) if you would make 
> it easier for the developer and this is simply: "reinvent the wheel". 
> 
> Do we really need this? IMO not, there is already a library for this issues 
> and we don't need one more proxy which call at the end a function of this lib 
> (which is also more expensive than use the lib directly).
> 
as pointed out in a previous mail, embedded systems might not even have
that X library, so if an app is supposed to work in all desktops, it
would have to write code for that case where no DPMS lib is available,
but rather a different thing. It's better if the app just have to use
the power management DBUS interface, and that way it works in all
systems.
-- 
Rodrigo Moya <rodrigo at gnome-db.org>