Earlier quoted context omitted.
I'm running 4 monitors without any issue…
My cofounder is as well, on Xubuntu. Meanwhile, I've had multiple issues getting just 2 to work across years of using Ubuntu (there was a good few year span when I didn't have to fiddle with anything and it did just work). Recently, I had a second monitor running with my Ubuntu installation, but one day the monitor stopped working, and the next I couldn't build JS projects without running the command as root (?!). Sw…
I don't see how Ubuntu would be responsible for that, sounds like PEBCAK to me