[Xmonad] darcs patch: Allow user to override Xinerama detection

[Andrea Rossato]

On Fri, Aug 17, 2007 at 08:08:23PM -0500, Alec Berryman wrote:
> (please ignore previous patch - I forgot to update the README)
> 
> The attached patch allows the user to override Xinerama detection.  I
> have the Xinerama headers installed because Debian's GTK+ development
> packages require it, but I only have one screen; for some reason,
> probably related to the laptop's VGA out, xmonad thinks there's a second
> one and I lose a workspace.  The attached patch allows the user to pass
> the --without-xinerama to configure to manually disable xinerama.

I believe you should investigate your X installation, since your patch
should not be needed. XMonad uses getScreenInfo to see whether it's
running in a Xinerama environment or not.

getScreenInfo is a (very safe) wrapper around XineramaQueryScreens. In
the man page (man XineramaQueryScreens) I can read that
"XineramaQueryScreens() returns NULL and sets number to 0 if Xinerama
is not active."

In other word there are strong reasons to suppose that the problem is
not on the XMonad side, but on yours. And, obviously, I don't think
XMonad should be written with malfunctioning X servers in mind...;-)

Just my 2 cents (I don't use Xinerama).

Andrea