@franz I faced screen flicker on 5.4.40 upwards in kubuntu. Now on Mx Linux 5.10 no issues.
@franz do you use modesetting ddx driver or intel driver? Do you experience tearing on both? You can check in Xorg/Wayland logs.
@kmicu I'm using the Intel driver (i915). I haven't tried anything yet. It really isn't that bad.
@oros I have these issues both on my laptop and the attached HDMI screen (Intel 8th Gen.). The problem seems more pronounced on the external screen though. I might try switching to 5.10 once it starts bothering me.