Bug 513967

Summary:	Screenlock repeats 'Unlocking Failed' endlessly, allowing no input.
Product:	[Plasma] plasmashell	Reporter:	freddyforney
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal
Priority:	NOR
Version First Reported In:	6.5.4
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description freddyforney 2025-12-30 06:13:20 UTC

SUMMARY
Without any input, the KDE Lock screen attempts to unlock the computer repeatedly, preventing the ability to input the password. It notifies you that unlocking failed, and then repeats this endlessly. Even with all input devices unplugged after the prompt is presented, this continues.

STEPS TO REPRODUCE
1. Lock the computer. (Meta + L)
2. Trigger the login prompt.

OBSERVED RESULT
The prompt immediately notifies the user 'Unlocking failed' and will continue to do this immediately after the brief timeout.

EXPECTED RESULT
The prompt waits for the user to input the correct password and submit it to unlock the desktop.

SOFTWARE/OS VERSIONS
Arch Linux 6.18.2-arch2-1
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1

ADDITIONAL INFORMATION
Checking the KWin debug console, there is no stuck keys or stuck input that appears. I'm not sure what else to provide, please let me know what I can do to get you the information needed to further trace the problem. This also does not appear to be a new issue as per this topic https://discuss.kde.org/t/resolved-plasma-6-lock-screen-repeatedly-shakes-and-says-unlocking-failed/13754

Comment 1 freddyforney 2025-12-31 03:13:25 UTC

pam.d misconfiguration pertaining to a user not being in a group and auto-failing no matter what when the user is not in that group.