Thought I might mention this. It's not running on a slow machine etc. KDE5.26 27"monitor 2560x1440
Curious thing is that it's worse over the desktop and not so bad if it's over another window and often stays straight. No problems with the top and bottom even if it's just moved up and down. The side to side on the edges was easy to notice and no signs of this on 4 at all. Maybe wayland might help at some point. If any one on here has access to those people please ask them not to forget graphic tablets users. I use a hanvon. Some one maintains a driver. The tablet is fully featured and needs X to set it up. It's 1/2 the price of a similar waycom. Some might say better too actually. John -