[xmonad] Dual-Monitor setup with GNOME (Help!)

Alexey Feigin mysteriousentity at gmail.com
Fri Oct 16 02:10:38 EDT 2009

Thank you for your reply wmw!

I n00bishly hadn't noticed the troubleshooting Xinerama section in the FAQ.
Turns out I misspelled "true" in my xorg.conf and Xinerama was not enabled.

Now that Xinerama is enabled xmonad works as expected with both monitors.

There is one small problem. I get the following error a lot:

Xlib: extension "RANDR" missing on display ":0.0".

Reading forum threads found through google, the only sound advice I was able
to find was "disable Xinerama and use foobar" (I assume this is not an
option if I want xmonad).

Any advice on how to get rid of this error?


2009/10/16 Wirt Wolff <wirtwolff at gmail.com>

> Excerpts from Alexey Feigin's message of Thu Oct 15 00:07:46 -0600 2009:
> >
> > Normally I use xmonad with gnome. When I connected the second monitor and
> > configured xorg.conf with Xinerama, the second monitor just shows the
> > background and I can't move any windows into it. I can move my mouse into
> it
> > and select things from menus in the gnome bar, but the windows always
> appear
> > on the primary monitor. (Also, the second monitor appears to have a
> second
> > mouse, with a cursor that looks like an X, not the gnome cursor.)
> >
> > I'm on Ubuntu 9.04 with xmonad 0.8.
> > The video card is ATI Radeon HD 3450 (using fglrx).
> There are two sections in the FAQ on the wiki that might help:
> http://haskell.org/haskellwiki/Xmonad/Frequently_asked_questions
> I would start with the Configuration/Multi-head & Workspaces one, to see
> if mod-w mod-e, mod-shift-e, etc., and workspace switching works as it's
> supposed to. If not then you could go to the Multi-head troubleshooting
> part
> to make sure your haskell x11 was compiled with xinerama support, but I
> suspect that your haskell setup is okay, from what you describe.
> If default xmonad screen and workspace handling isn't working correctly I'd
> suspect your multi-head is actually not in a xinerama configuration but
> rather using separate X displays. Unfortunately I know nothing about ATI
> xinerama configuration, hopefully others can step in if that does turn out
> to be the problem.
> regards,
> --
> wmw
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