Bug 437779

Summary:	Mouse input breaks if graphics tablet is connected
Product:	[Plasma] kwin	Reporter:	Alexander <alexander.reimelt>
Component:	input	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.21.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Alexander 2021-05-28 13:34:07 UTC

I don't know how this happens because it feels random. If I mix mouse and pen input on GTK applications they can completely break and reject any input. The first thing I notice is a offset between mouse click and cursor hover input on drop down menus. If I continue to click on things on the GTK window using pen and mouse they completely reject any input.

tested on Xournal++ and mypaint

Operating System: openSUSE Tumbleweed 20210524
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
Kernel Version: 5.12.4-1-default
OS Type: 64-bit
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 15.6 GiB of RAM
Graphics Processor: AMD Radeon RX 5700

Comment 1 Nate Graham 2021-05-28 18:50:15 UTC

This would either be a bug in GTK itself, or in the relevant drivers (libinput and/or wacom; depends on which drivers you have active. I suspect GTK itself. Regardless, please report it upstream first https://gitlab.gnome.org/GNOME/gtk/-/issues/.

If they insist it's not their fault, we can re-investigate this here.

Thanks!