Hey there, I've noticed recently that when using a second display with my laptop I've been having severe screen tearing problems on the display that I've set as secondary. So if I set my monitor as primary and my laptop's display as secondary and open this screen tearing test on the laptop screen I can see the bar being broken.
This also happens when using my monitor as secondary(the monitor tears). Happens on both Wayland and Xorg and it doesn't occur on Windows 10. I'm using my Intel GPU for everything (Intel HD Graphics 4000, Mesa driver v13.0.3), so it isn't some sort of Nvidia problem. I do have a GTX 660M with the nouveau drivers, but I never use it.
This is really annoying, especially when I want to play a game of Risk of Rain or watch a video. Any idea how I can fix this?