I have just struggled with a similar issue for the last several days:
Ubuntu 9.04 (AMD64) with NVidia drivers
I have a primary monitor in 1024x768 and a projector in 1920x1080 and prefer to
run with separate x-screens. This worked fine in Ubunty 8.04, but with Ubuntu
9.04 the 2nd screen did not work properly.
After a bunch of messing around I finally realized that the problem is that
there is no "screen1" directory in /.gconf/apps/compiz. There is a "screen0"
directory there though. To fix the issue I did the following:
1) Installed CompizConfig Manager using "- sudo apt-get install
compizconfig-settings-manager"
2) In the CompizConfig Settings Manager -> General Options -> Display Settings
- Disabled "Detect Outputs"
- Set Outputs to "1024x768+0+0"
3) In a terminal
- cd .gconf/apps/compiz
- mkdir screen1
- cp -r screen0/* screen1
- cd screen1/options
- vi %gconf.xml --> Modified resolution to "1920x1080"
4) I rebooted and everything works fine (except the mouse still has that odd
behavior)
--
Separate X screen blank in Jaunty (nvidia)
https://bugs.launchpad.net/bugs/366743
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