Twinview gaming is hard .. one large desktop.

[Andre-K]

I have two big monitors on Nvidia card.
They run in "twinview" - the problem is that the desktop size is two-monitor-wide.

Games start in the middle of them two.
Citrix Session won't run in seamless mode (draws a big window around).

please help me configuring them as two separate monitors. - so a fullscreen game runs on only one of them.

[8rytpq]

Hi, you can fix allot of games by:

export SDL_VIDEO_FULLSCREEN_HEAD=1

[Andre-K]

thanks , executed the command in terminal - it did not help.

[Lysius]

You could try to add a line similar to the following to the Screen section of your xorg.conf:

Option "Metamodes" "1680x1050,1680x1050; 1280x800,1280x800; 1280x1024,1280x1024; 1024x768,1024x768; 800x600,800x600; 1680x1050,NULL; 1280x800,NULL; 1280x1024,NULL; 1024x768,NULL; 800x600,NULL; 640x480,NULL"

Of course you should delete modes you do not need/want or that your monitors do not support.

[Andre-K]

thanks - should I keep the line I copied here ?
I added your suggestion below the line, and it did not help.

  Option         "metamodes" "DFP-0: nvidia-auto-select +1920+0, DFP-1: nvidia-auto-select +0+0"

[Lysius]

Originally Posted by Andre-K

thanks - should I keep the line I copied here ?
I added your suggestion below the line, and it did not help.

  Option         "metamodes" "DFP-0: nvidia-auto-select +1920+0, DFP-1: nvidia-auto-select +0+0"

you should delete it or comment it out.

[Andre-K]

yes, that helped, now the only problem is that the left display and right display are mixed up.. do you know how to change that ?
Left is primary, as it should, the problem is that I need to move mouse to left to get to the right display.

[Lysius]

Originally Posted by Andre-K

yes, that helped, now the only problem is that the left display and right display are mixed up.. do you know how to change that ?
Left is primary, as it should, the problem is that I need to move mouse to left to get to the right display.

the easiest way is to just switch the display cables

[Andre-K]

ok - thanks again.

There's something fishy with the nvidia drivers, I still see two workspaces, yet I have a cube.
Also, Penumbra Overture Demo still goes crazy and draws now partially off-screen.

[gbil]

Originally Posted by Andre-K

ok - thanks again.

There's something fishy with the nvidia drivers, I still see two workspaces, yet I have a cube.
Also, Penumbra Overture Demo still goes crazy and draws now partially off-screen.

Actually nothing is fishy with the drivers but this is how twinview works, as a large desktop so the game just sees a large desktop. One 'solution' is to use the proposed configuration so when a specific resolution is used only one display is used.

[Lysius]

Originally Posted by Andre-K

There's something fishy with the nvidia drivers, I still see two workspaces, yet I have a cube.

cube? You should now have a workspace spanning two monitors with a virtual boundary for window maximization in the center. Depending on how your desktop environment is configured, you should have some way to switch to other virtual desktops, all spanning the two monitors.

Originally Posted by Andre-K

Also, Penumbra Overture Demo still goes crazy and draws now partially off-screen.

Does it use a resolution you have now in your metamodes but your monitor does not properly support? You can use xrandr, krandrtray or any other frontend to randr and test if all modes are working properly. If not, drop them. And you might want to add some additional modes.