Consistent handling of USB device buttons

[Xavier Bestel]

On Tue, 2012-08-21 at 13:16 +1000, Peter Hutterer wrote:
> > 1. Buttons have session global effect and there's no easy, nor stable way to
> > limit their effect to a particular device.
> 
> I don't understand this bit. can you paraphrase?

I guess he means if you have two webcams with a "mute" button, there's
no way to associate the button with a particular webcam. To X11 it's
just a global mute button.

	Xav