Yeah, I’ve never seen a display… don’t know what word to use… stutter? It’s like lines of the background would flicker through the main bar (or whatever you call this border that has the tray in in Ubuntu) and the dock, but only on mouse movement. Some searching suggested that dynamic display features could cause it, but I wasn’t using any; I tried turning off ‘Night Light’ (like a native version of f.lux), to no visible effect. Hardware really is the most logical source, I think; got this HP 24 fh back in… November? Ugh.