I’ve been checking this issue with both pen-tablets, with a Wacom Graphire A6 and with a Huion WH1409. It does not matter it the pen tablet is connected by cable or wireless. We are talking Fedora Silverblue 31 here.
To reproduce this issue, just need to follow this steps, whichever the tablet, outcome is the same:
1- Plug in the pen tablet
2- Open any software that uses it (Inkscape, Gimp, MyPaint, Blender, Krita…)
3- Start drawing
4- After some time drawing the pen cursor disappears from the screen, only mouse cursor visible
With this issue, it turns out to be too hard to use the pen tablet after those initial minutes where the tablet does work properly.
On item 4, the pen tablet is still usable, though there is no way to know where the cursor is until you start painting or dragging. Pretty messy.
[Edit] Well, I did some checking inside each app, and looks like the pen tablet is taken as a “touch screen” in Wayland. Actually, with a touch screen there would be no problem, as the place you put the pen/stylus is exactly the same on the screen, look at the screen, stylus and digitizer at the same time as screen and drawing pad are the same thing.
On a plain Pen Tablet digitizer, no screen, I look at the screen, not at the pad. But I can’t change the pad/stylus mode from “touchscreen” to cursor/screen/window whatever.
Any hints on how to solve this issue would be greatly appreciated.