I have a laptop with a GTX 970m (Nvidia prop drivers) running KDE Neon on the plasma desktop (think Kubuntu - it's essentially the same),
If I connect three monitors (eDP-1, HDMI-2, HDMI-3), the system will become unresponsive and lock up after ~10 minutes of usage. Typically when I move the mouse between the latter monitors, it will stutter as if it's spinning off an endlessly recursive call leading to a full lockup where nothing I do will cause the displays to update (eg: Ctrl + Alt + F2)
It should be noted that similar stuttery behavior occurs when just running a system with two monitors, but it's easy to break out of it by pulling the mouse back onto the primary display. It feels like by adding more monitors, you are squaring the extent of damage done when Nvidia decides you're having too much fun and decides to throw a fit
If I were to switch to using my Intel internal graphics, I can suddenly use all three monitors with no issues what so ever with the added bonus of proper display scaling on the laptop display and being able to reposition the displays and have the effects apply instantly as if I hit F5 on a locally stored webpage. Basically the Intel drivers are infinitively superior but suck like hell when ever I try to play more than prison architect. Is there a way to use the Nvidia drivers without my system locking up and without having to return to 2 monitors?
Note: I do not know how to check the Nvidia driver version installed whilst not running said drivers and checking in nvidia-settings