SUMMARY If you have a right click context menu open, the screen lock will not activate. Regardless. closing the lid sends the laptop to sleep and it wakes up without a lock screen. also triggering the lockscreen with a keyboard shortcut doesnt work. STEPS TO REPRODUCE 1. right click somewhere here on the browser 2. Trigger the lock screen. Meta+L or close laptop lid. OBSERVED RESULT No lock screen EXPECTED RESULT Locked screen requiring password SOFTWARE/OS VERSIONS Operating System: KDE neon 5.16 KDE Plasma Version: 5.16.4 KDE Frameworks Version: 5.61.0 Qt Version: 5.12.3 Kernel Version: 5.0.0-25-generic OS Type: 64-bit Processors: 8 × Intel® Core™ i7-8550U CPU @ 1.80GHz Memory: 7,6 GiB of RAM ADDITIONAL INFORMATION
This is a known limitation on X11 and is fixed on Wayland.