https://bugs.kde.org/show_bug.cgi?id=519873

            Bug ID: 519873
           Summary: kscreenlocker_greet blocks further unlock attempts
                    after one wrong password
    Classification: Plasma
           Product: plasmashell
      Version First 6.6.4
       Reported In:
          Platform: Neon
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: Screen locking
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: 1.0

SUMMARY

If I enter an incorrect password even once on the lock screen,
kscreenlocker_greet does not allow me to make another attempt afterwards. I can
type the password, but neither the Enter key nor the corresponding icon next to
the password field has any effect.

I have to press Ctrl+Alt+F3, log in to the console, and run:

killall -9 kscreenlocker_greet

This issue is consistently reproducible on all of my computers. On one of them,
the following systemd script helped, but on the others it does not work.

#!/bin/bash
journalctl _COMM=kscreenlocker_g -f -n 0 | stdbuf -oL grep "Authentication
attempt too soon" | while read -r line; do
    echo "KDE Lock bug detected. Resetting greeter..."
    killall -9 kscreenlocker_greet
done

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.25.0
Qt Version: 6.10.2
Kernel 6.17.0-23-generic
Wayland

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