I have Ubuntu 18.04. I have two monitors, one hooked up to an HDMI port, the other to displayport.
My left monitor is labeled 1, and primary. My right monitor is labeled 2.
Previously, when I'd turn the 1 monitor off, the 2 monitor would flicker, and reset itself as primary. At this point, the mouse pointer was contained on the monitor. Now, out of nowhere, when I turn it off, the mouse pointer will still go off screen to monitor 1.
I have no clue what the problem could be. Does anyone have advice?