Created attachment 154248 [details]
pentablet

I have xp-pen deco mini7 tablet with 8 buttons and a pen with 2. The tablet page in system settings shows 3 buttons available to rebind. Of those three, the first one rebinds one of the buttons on the pen, the other 2 don't seem to have any effect.

In evdev the tablet appears as 3 devices:
1. /dev/input/event7:      UGTABLET 6 inch PenTablet Mouse
2. /dev/input/event8:      UGTABLET 6 inch PenTablet Keyboard
3. /dev/input/event9:      UGTABLET 6 inch PenTablet

On the system settings page it appears as 'UGTABLET 6 inch PenTablet'.

 It's not a hardware issue, all of the buttons work out of the box with predefined bindings, and are detected by evdev-record and libinput debug-events. Buttons on the tablet come from /dev/input/event8 and the ones on the pen from /dev/input/event9, I think.

 I can rebind all of the buttons using the official xp-pen app/driver - but if I run that app the buttons only work in Krita and seem to become inactive elsewhere. The other drawback of using the official app is that mapping of screens becomes all messed up, because it seems to conflicts with kde (on wayland, on x11 it works fine).
If I use the official xp-pen app/driver 3 additional devices are created:
1. /dev/input/event30:     XP-PEN STYLUS
2. /dev/input/event31:     XP-PEN MOUSE
3. /dev/input/event256:    XP-PEN ERASER

kde built using kdesrc-build
evemu-describe outputs in attachments