[kwin] [Bug 523647] Mouse input hangs randomly in Chromium/Electron apps under Wayland

https://bugs.kde.org/show_bug.cgi?id=523647

--- Comment #4 from Kuppuswamy <[email protected]> ---
Update: I was able to reproduce the same problem on Pop!_OS COSMIC as well, so
this does not appear to be specific to KDE Plasma or GNOME 50.

After further investigation, I found that the built-in touchscreen's Wacom HID
5365 Pen device was generating unexpected TABLET_TOOL_PROXIMITY (proximity-in /
proximity-out) events even though no pen was being used and the touchscreen was
not being touched.

These events were observed around the time when mouse clicks and scrolling
stopped responding in Chromium. After disabling the Wacom pen/touchscreen input
devices through libinput/udev, I have not been able to reproduce the problem so
far.

Therefore, this may be related to the unexpected Wacom pen proximity events or
their handling rather than being specific to KDE Plasma. I will continue
testing and update the report if the problem occurs again.

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