SUMMARY In the task manager, when i hover mouse on 2 tasks back and forth, journalctl log is filled with flood of messages like: 14:32:43 linux-fdsk plasmashell[2711]: qt.qpa.xcb: QXcbConnection: XCB error: 2 (BadValue), sequence: 47814, resource id: 182452481, major code: 142 (Unknown), minor code: 3 STEPS TO REPRODUCE 1. start journalctl -f 2. hover the task in task manager widget OBSERVED RESULT the log message appears every time mouse moves to another task item EXPECTED RESULT journalctl should not get flooded with messages like this if it is not critical. SOFTWARE/OS VERSIONS KDE Frameworks 5.56.0 Qt 5.12.2 The xcb windowing system Plasmashell 5.15.4
Should be fixed by https://cgit.kde.org/plasma-framework.git/commit/?id=1b2424879a198af3de2988f64182d70e6c0c199e
Yup, that fixed it. *** This bug has been marked as a duplicate of bug 406303 ***