Bug 512494

Summary:	Unable to use graphics tablet stylus to click Start Button (kickoff widget) (X11 sessions)
Product:	[Plasma] plasmashell	Reporter:	Tyson Tan <tysontanx>
Component:	Application Launcher (Kickoff) widget	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	mikel5764, nate, noahadvs
Priority:	NOR	Keywords:	X11-only
Version First Reported In:	6.3.6
Target Milestone:	1.0
Platform:	Manjaro
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Tyson Tan 2025-11-23 01:53:09 UTC

SUMMARY

Graphics tablet stylus seems to have difficulty triggering the Start Button (kickoff widget). In the beginning of every new session, I can't click to trigger the Start Button with a stylus unless I repeatedly click on it for may times (sometimes even that wouldn't work). And once triggered, I can click it in the rest of the session.

I have tested this with Wacom/Huion/XP-Pen tablets and displays, both linuxwacom and opentabletdriver, all failed to work. So it's hardware/driver unrelated.

This issue existed since Plasma 6 came out, as far as I can remember.

Similar problem happens to the Apply Global Theme popup dialogue in systemsettings. 
See: Bug 512493


STEPS TO REPRODUCE
1. Login
2. Try to click the Start Button with a stylus
3. 

OBSERVED RESULT
Can't trigger the Start Button.

EXPECTED RESULT
Can trigger the Start Button.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.17.1-0-MANJARO (64-bit)
Graphics Platform: X11

Comment 1 Tyson Tan 2025-11-23 02:00:28 UTC

Seems to only affect X11 sessions.

Comment 2 Tyson Tan 2025-11-23 02:48:58 UTC

I noticed that in some X11 sessions, the stylus's middle button wouldn't work on certain elements after login.

On desktop, there was a time today when I couldn't middle-click to create a sticker note. After clicking repeatedly, it finally registered, resulting in multiple sticker notes being created at once as if previous clicks were queued.

In Chromium, there was one occasion today that I could use my stylus to middle-click the Tab bar to close a tab, but couldn't open a bookmark in a new tab with middle-click. I then gave up and go to test things on the desktop instead, as aforementioned. When middle-click finally worked again on desktop, I found it now also worked in Chromium. This suggests an issue on the system side, perhaps "holding up stylus middle-clicks until they got released".