Fullscreen issue with multiple monitors
|« Mouse jumping to bottom right corner||The fs2_open on Linux Guide
Fullscreen issues with multiple monitors
If you have issues with fullscreen FSO running on the wrong monitor or running across both monitors, try setting this in the script/terminal/etc that you use to run FSO:
where 0 is the number (as reported by xrandr) of the monitor that you want FSO to run fullscreen on.