Bug 514444

Summary:	Fingerprint unlock gets stuck until nudged by another request
Product:	[Plasma] plasmashell	Reporter:	Kai Uwe Broulik <kde>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	6.5.80
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Kai Uwe Broulik 2026-01-11 07:21:19 UTC

SUMMARY
I set up fingerprint auth through fprint. When I lock the screen, it asks me to "place finger on reader". I do that. Nothing happens. Only when I then enter _any_ password (or just hit return with empty password) it gets unstuck and realizes "oh rigthy, the finger was already correct, unlocking"

STEPS TO REPRODUCE
1. Set up fingerprint auth through fprint
2. Lock screen
3. Place finger once prompted

OBSERVED RESULT
Nothing happens until I hit return or enter any password

EXPECTED RESULT
It unlocks

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: git master as of 2026-01-10
Qt Version: 6.10.1

ADDITIONAL INFORMATION
Seems the pam request waits for some signal indefinitely that never arrives and only doing another request nudges it to realize it’s already completed. I do not get the infamous “Unlock” button, it just sits there doing nothing until I trigger another auth request.