SUMMARY So I came across this very weird bug: Sometimes when connecting the Wacom touchscreen (aka. opening the Laptop/logging in), touch-clicking inside kde does not work. The coursor moves to the position clicked, but no click is registered. Clicking with the mouse somewhere else inside KDE omits the original click from the touchscreen. Trying clicking in e.g. Firefox or Thunderbird does always work, so I think it's not an issue with the touchscreen or the drivers. Reconnecting the tablet a few times always solves the problem, but is very annoying. STEPS TO REPRODUCE Happens to my experience always for the initial login while only using the Laptop screen and sometimes when connecting (aka. opening) the touchscreen while using a second monitor. I hope this is the right place for the bug report and this has something to do with KDE Plasma, but I did not find a better place to start asking for help with this problem. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 5.4.0-48 (available in About System) KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 ADDITIONAL INFORMATION xsetwacom version: 0.39.0
So sometimes it works in all apps and stays working the whole time it's connected Sometimes it only works in some apps and that persists till the next time it's reconnected? Does clicking in "xev" tell us anything.
Exactly. If it is not working I have to reconnect a few times to get it working again. It does not suddenly start working in all apps without reconnecting. If it's working it stays working in all apps as long as I don't reconnect it (then it sometimes stop working again). In xev I get the following output while its not working inside kde: ButtonPress event, serial 37, synthetic NO, window 0x7000001, root 0x5c5, subw 0x0, time 219651, (123,78), root:(123,114), state 0x10, button 1, same_screen YES ButtonRelease event, serial 37, synthetic NO, window 0x7000001, root 0x5c5, subw 0x0, time 219736, (123,78), root:(123,114), state 0x110, button 1, same_screen YES And while its working in all apps (I tried to not get a MotionNotify event in between, but wasn't able to): ButtonPress event, serial 40, synthetic NO, window 0x7000001, root 0x5c5, subw 0x0, time 642039, (109,77), root:(109,113), state 0x110, button 1, same_screen YES MotionNotify event, serial 40, synthetic NO, window 0x7000001, root 0x5c5, subw 0x0, time 642099, (109,77), root:(109,113), state 0x110, is_hint 0, same_screen YES ButtonRelease event, serial 40, synthetic NO, window 0x7000001, root 0x5c5, subw 0x0, time 642099, (109,77), root:(109,113), state 0x110, button 1, same_screen YES Of course I'm no expert, but the xev output seem normal to me. Where else can I look for errors?
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Forgot that I needed to change the Status after reporting back.
Figured it out and fixed it. It's a bug in a setting in the Wacom driver. See Bug 440556. *** This bug has been marked as a duplicate of bug 440556 ***