I have been unable to get a multi-monitor setup working, and the information online for this topic is sparse and often conflicting. Hopefully someone here can provide a decisive answer.
I would like to run a single X server with a single X screen that spans across 4 monitors attached to 2 identical GPUs (3090s). Graphics applications should see a single display with a resolution equal to the sum of the four monitors (in this case, 7680x4320), and I should be able to move my mouse and draw windows seamlessly across the 4 displays.
I’m seeing options like Mosaic, Surround, and MultiGPU.
My question is:
Do any of these work for Linux with my hardware? And if so, how would I go about setting up my X11 environment (xorg.conf) to achieve this configuration?
I am referencing these guides without success:
Ubuntu Server 20.04
2x GeForce RTX 3090
4x 4K, 60hz monitors
No desktop manager yet, just vanilla X.org
I appreciate any help with this topic