Bug 512067

Summary: Clipboard portal can't copy from primary selection
Product: [Plasma] xdg-desktop-portal-kde Reporter: Adam <adaha>
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: aleixpol, kde, nate
Priority: HI    
Version First Reported In: 6.5.1   
Target Milestone: ---   
Platform: Other   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=511989
Latest Commit: https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/6cd84564b19dfa28b32d9d2848f91e913c668cca Version Fixed/Implemented In: 6.5.3
Sentry Crash Report:

Description Adam 2025-11-14 08:49:54 UTC 
SUMMARY
When selecting text in KDE in a RemoteDesktop session with the Clipboard portal enabled, the SelectionOwnerChanged signal is emitted. When requesting data from one of the available mimetypes, instead of reading from the primary, it will read from selection.

STEPS TO REPRODUCE
1. Copy text into selection (CTRL+C)
2. Copy text into primary (select text)
3. Read selection data (CTRL+V on client)

OBSERVED RESULT
The clipboard will read from selection, even when it seems like the primary selection was the one that triggered the signal.

EXPECTED RESULT
Unfortunately, the protocol does not mention the primary selection. I would expect primary to either not work (no signal emitted for primary), or for both primary and selection to be affected when reading from / writing to the clipboard.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 43
KDE Plasma Version:  6.5.1
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
xdg-desktop-portal-kde-6.5.2-1 (+ patch https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/b7f2107d0eb35d2b4cfccf9ffaa91437b88eff0a)
Comment 1 Bug Janitor Service 2025-11-14 13:43:32 UTC 
A possibly relevant merge request was started @ https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/merge_requests/482
Comment 2 Nate Graham 2025-11-14 18:25:31 UTC 
Git commit a0c60666dccf4389576dc159d70298d48707fafb by Nate Graham, on behalf of David Redondo.
Committed on 14/11/2025 at 18:25.
Pushed by ngraham into branch 'master'.

clipboard: Don't emit changes for primary selection

The portal handles only selection
FIXED-IN: 6.5.3

M  +4    -1    src/clipboard.cpp

https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/a0c60666dccf4389576dc159d70298d48707fafb
Comment 3 Nate Graham 2025-11-14 19:53:49 UTC 
Git commit 6cd84564b19dfa28b32d9d2848f91e913c668cca by Nate Graham.
Committed on 14/11/2025 at 18:27.
Pushed by ngraham into branch 'Plasma/6.5'.

clipboard: Don't emit changes for primary selection

The portal handles only selection
FIXED-IN: 6.5.3


(cherry picked from commit a0c60666dccf4389576dc159d70298d48707fafb)

2c69b04e clipboard: Dont emit changes for primary selection
0234cd27 Edit clipboard.cpp

Co-authored-by: David Redondo <kde@david-redondo.de>

M  +4    -1    src/clipboard.cpp

https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/6cd84564b19dfa28b32d9d2848f91e913c668cca