I'm using plasma 5.14.1 with Qt 5.14 beta 2 on Arch Linux. STEPS TO REPRODUCE 1. start Wayland session 2. try to open logout screen by pressing ctrl+alt+del 3. OBSERVED RESULT no logout screen, I only see a small grey/white gui element in the upper left corner of the screen. Logout occurs automatically after the countdown. EXPECTED RESULT logout screen shows up. SOFTWARE VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.14.1 Qt Version: 5.12.0 beta2 KDE Frameworks Version: 5.51.0 ADDITIONAL INFORMATION logout screen works as expected under X11.
Can confirm on Arch Linux.
*** This bug has been marked as a duplicate of bug 399918 ***