SUMMARY I get a message that state that I need to use loginctl unlock-session 5 to restore my locked session, in a black screen. STEPS TO REPRODUCE 1. set screen lock to 5 minutes 2. wait until lock 3. try to login again OBSERVED RESULT a black screen with instructions to unlock the session using commands EXPECTED RESULT unlock my session using the gui login manager SOFTWARE/OS VERSIONS Operating System: KDE neon 5.24 KDE Plasma Version: 5.24.3 KDE Frameworks Version: 5.91.0 Qt Version: 5.15.3 Kernel Version: 5.13.0-35-generic (64-bit) Graphics Platform: X11 Processors: 6 × Intel® Core™ i5-8400 CPU @ 2.80GHz Memory: 22.9 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics 630
Crashes need a backtrace to be actionable. You may find it easier to run kscreenlocker_greet --testing manually
This appears to be the same problem as mentioned in bug 451315. I'd mark this as a duplicate, but since it was reported first I'm not sure if that is the right way to go about it. Either way, there is more information to be found in the other reports on the same bug. :^)
Created attachment 147418 [details] error reported by kde This is the error reported when I woke up my pc after session lock down
(In reply to David Edmundson from comment #1) > Crashes need a backtrace to be actionable. > > You may find it easier to run kscreenlocker_greet --testing manually Can you list the commands to log this error? I tried that command without success
/usr/lib/libexec/kscreenlocker_greet --testing
(In reply to David Edmundson from comment #5) > /usr/lib/libexec/kscreenlocker_greet --testing it say: command not found
Some distros change it. It might be lib64 instead of lib. You can try finding the file, failing that lets hope someone else hits the same bug
(In reply to David Edmundson from comment #7) > Some distros change it. It might be lib64 instead of lib. > > You can try finding the file, failing that lets hope someone else hits the > same bug cannot find either
For KDE Neon it should be: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --testing
(In reply to Gabriel from comment #9) > For KDE Neon it should be: > /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --testing I get: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet: symbol lookup error: /lib/x86_64-linux-gnu/libLayerShellQtInterface.so.5: undefined symbol: wl_proxy_marshal_flags
(In reply to Franco Pellegrini from comment #10) > I get: > /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet: symbol lookup error: > /lib/x86_64-linux-gnu/libLayerShellQtInterface.so.5: undefined symbol: wl_proxy_marshal_flags Hm, okay. A guess would be that 'wl' means Wayland perhaps? I know that there were some related packages missing in the 5.24.3 update, so could you please make sure that you're completely up to date and try the screen locker again? I encountered this same issue and updating resolved it for me. It's best to rule out that possibility first before before digging deeper. :^)
*** This bug has been marked as a duplicate of bug 451315 ***