Tearing on 4k DP MST monitor
I have a 4K montior (Dell UP2414Q) that represents itself over DP MST as two 1920x2160 panels xrandr.txt
It works mostly fine nowadays, except for vertical tearing on the boarder between panels. It's especially visible during video playback.
The issue seems to independent of what gpu and driver are used: both nouveau and i915 are affected.
Is there a way to get rid of the tearing? It's very annoying.
I use awesomewm without any compositors. I've tried to use picom with various options, but it doesn't help.
Have no clue what layer of graphics stack it has to be addressed: kernel/Xorg/compositor. Any directions are welcome.