Bug 501317

Summary:	Text copied from XWayland windows can still be pasted into other XWayland applications after the Clipboard history is cleared
Product:	[Plasma] kwin	Reporter:	sergeyprotserovca
Component:	xwayland	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	CONFIRMED ---
Severity:	normal	CC:	f-kde, john.kizer, nate
Priority:	NOR	Keywords:	wayland-only
Version First Reported In:	6.3.2
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description sergeyprotserovca 2025-03-10 20:08:57 UTC

SUMMARY

Text copied from XWayland windows persists in the XWayland clipboard even after it is removed from Klipper history as an individual item or after Klipper history reset.


STEPS TO REPRODUCE

1. Open two copies of KWrite, forcing one of them to run under XWayland, for example, like this: `WAYLAND_DISPLAY= kwrite`
2. Type something in the XWayland copy of KWrite, and copy this text
3. Observe that this text shows up in Klipper history, and can be pasted in both copies of KWrite
4. Remove this item from Klipper history or clear the entirety of Klipper history

OBSERVED RESULT

The text can no longer be pasted in the Wayland copy of KWrite, but can still be pasted in the XWayland copy of KWrite

EXPECTED RESULT

The text can no longer be pasted in both Wayland and XWayland copies of KWrite


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Fedora 41
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2

Comment 1 sergeyprotserovca 2025-03-10 20:42:16 UTC

Note about the reproduction steps: as written, they assume that the Klipper history is empty at the start of the reproduction. If this doesn't hold, i.e. there is something in Klipper history, merely deleting the current text item from it switches clipboards to the previous item, which, as far as I can tell, works correctly. Clearing Klipper history, however, still reproduces the bug.

Comment 2 John Kizer 2025-05-29 19:00:43 UTC

I can reproduce on Fedora KDE 42, using Kate (forced into XWayland mode) and Vivaldi as the example applications. Thanks!