fglrxmultiple-monitorsunity
I currently run Ubuntu 11.10 with Unity and FGLRX driver. I also use two monitors. Right now, if I maximize a window it does so across both screens. In addition, things like alt-tab will display split across both screens. It seems as if the computer is running with one giant desktop as opposed to two seperate desktops (workspaces?) as it did with the open source driver.
And no, I cannot go back to the open source drivers as they do not support hybrid graphics like the FGLRX drivers do.
Yes there is. You need to wirte a second metamode into your /etc/X11/xorg.config. For me it looks like this:
# excerpt from /etc/X11/xorg.config
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "1"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "CRT: nvidia-auto-select +1680+0, DFP: nvidia-auto-select +0+0;1024x786,NULL;NULL,1680x1050"
SubSection "Display"
Depth 24
EndSubSection
EndSection
I have an old LCD-monitor connected to my laptop. The LCD is called 'CRT' in xorg.config has a resolution of 1024x768. The laptop screen called 'DFP' in the file with resolution 1680x1050.
In my xorg.config you will find three metamodes (line Option "metamodes" "CRT: nvidia-auto-select +1680+0, DFP: nvidia-auto-select +0+0; 1024x786, NULL; NULL, 1680x1050") devided by semicolons:
CRT: nvidia-auto-select +1680+0, DFP: nvidia-auto-select +0+0; uses both monitors in auto select mode. NULL,1680x1050; deactivates the old CRT and sets the laptop screen resolution to that value.1024x786,NULL; deactivates the laptop screen and sets CRT to that resolution.Now you just have to add similar entries. Finding out which display is called what will help. Then you have to set your game to use the resolution specified in the additional metamode. That should do the trick.
If only have two monitors linked on twinview, but I use to have similar problems with the compiz defaults. Here's how I solved it, and I think it should work for you:
Install CompizConfig Settings Manager sudo apt-get install compizconfig-settings-manager and run it using ccsm.
In the list of options find Place Windows in the Window Management section.
Change the Placement Mode to Smart and the Multi Output Mode to Place across all outputs.
Best Answer
I know the way to achieve the opposite effect (force single-monitor behaviour on a dual monitor), so assuming coherence the following should work for you:
ccsminto the dash<resolution-x>x<resolution-y>+<offset-x>+<offset-y>. For example1280x1024+0+0and1280x1024+1280+0for two monitors side by side at 1280x1024unity --replaceso that compiz restarts. If compiz still refuses to apply the setting try logging out and back inIf 4.1 does not work, give 4.2 a try.