https://bugs.kde.org/show_bug.cgi?id=450542
Bug ID: 450542 Summary: Black screen after unplugging external monitors when laptop screen is disabled Product: kscreenlocker Version: 5.24.1 Platform: Kubuntu Packages OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: greeter Assignee: plasma-b...@kde.org Reporter: sbutcher+b...@gmail.com CC: bhus...@gmail.com Target Milestone: --- SUMMARY Removing the external displays (via thunderbolt dock) while the screenlocker is active results in a black screen on the laptop STEPS TO REPRODUCE 1. Attach laptop to dock and use external monitors ONLY (laptop screen disabled) 2. Lock screen (e.g. with super key+L) 3. Detach usb c dock cable OBSERVED RESULT Screen is black except for mouse cursor, cannot access desktop or screenlocker EXPECTED RESULT Expect to see the screenlocker password prompt with wallpaper background SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.24.1 KDE Frameworks Version: 5.91.0 Qt Version: 5.15.2 Graphics platform: X11 , Intel TigerLake-LP GT2 [Iris Xe Graphics] Distro: kubuntu 21.10 with backports PPA ADDITIONAL INFORMATION Other bugs seem to relate to compositing, and are fixable by switching ctrl-alt-f2 and back again to ctrl-alt-f1. However, this is not the same bug. My current workaround is : hit ctrl-alt-f2 and type "ps -ef | grep kscreenlocker_greet" then kill the PID of the process. Hit ctrl-alt-f1 and the screenlocker password prompt appears as expected. I can reproduce this at will. -- You are receiving this mail because: You are watching all bug changes.