[compiz] compiz works really strange with external monitor

[Danny Baumann]

Hi,

> > > "metacity doesn't know what is the full screen resolution"
> > > https://bugzilla.redhat.com/show_bug.cgi?id=431302
> > >
> > > Can you please look at it and say if this looks like a compiz, X,
> > > gnome which bug :)
> >
> > I've been aware of this issue for about a year or more now, but never
> > really considered it a bug. Like  Danny sais in the cf bug report [1],
> > it's totally wm-dependant how to treat this issue.
> 
> From users point of view it definitely is a bug and should be fixed.

It _is_ a bug, and definitely should be fixed - but IMO not inside
Compiz. Compiz can work around this, but then you have fixed
maximization, but still broken panels, because panels place themselves
and rely on Xinerama as well (e.g. gnome-panel via Gtk -> Gdk which
calls XineramaQueryScreens).
Do you want to have workarounds in all X11 clients out there that use
Xinerama? I'd rather disagree to that ;-)
I still think there are only two valid locations to fix this: either the
driver to not report a weird head configuration, or the X server to
filter out weird configurations.

Regards,

Danny