Edit: I’m glad so many of you have had no issues with multiple monitors. My set up is a little unusual (3rd display is an infrequently used large tv hooked through the receiver) and is definitely solveable but will take some effort (and honestly, I’d rather spend my spare time outside or with friends, so who knows when I’ll fix it.)
What distro are you guys using to get errors like that? I’ve been a Debian guy as long as I can remember and was so happy when I gave up using Windows for games. Windows doesn’t seem to scale worth a shit, I have two twenty-seven inch monitors and one twenty-four inch monitor flipped portrait (it feels wrong but is so great for documentation); when I move a window halfway between two different size monitors the window is all fucked up, on Debian it is the same physical size across the displays and doesn’t look like someone is trying to zoom in on half of it.
All that being said, my son’s computer is close (he runs Arch… btw), but not perfect… I don’t know if that’s an Arch thing or he just doesn’t care about it as much as I do.