Bug 523513 - Suspend/resume causes PAM authentication failure
Summary: Suspend/resume causes PAM authentication failure
Status: RESOLVED DUPLICATE of bug 521900
Alias: None
Product: plasmashell
Classification: Plasma
Component: Screen locking (other bugs)
Version First Reported In: 6.7.3
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-07-26 00:25 UTC by CM
Modified: 2026-07-26 21:14 UTC (History)
1 user (show)

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Description CM 2026-07-26 00:25:57 UTC 
DESCRIPTION
When I sleep my laptop and open it back up, then sleep again before logging in again, the next time I open it it causes a failed login attempt without me hitting any keys. When I've done this multiple times in a row it's triggered the 10 minute default lockout.

STEPS TO REPRODUCE
1. Sleep the computer
2. Wake it, then close it again without logging in
3. Wake it again

OBSERVED RESULT
A failed login attempt with no keys pressed.
Logs:
  pam_unix(kde:auth): unexpected response from failed conversation function
  pam_unix(kde:auth): conversation failed 
  pam_unix(kde:auth): auth could not identify password for [user]

EXPECTED RESULT
No login attempt

SOFTWARE/OS VERSIONS
Operating System (available in the Info Center app, or by running `kinfo` in a terminal window): EndeavourOS (Arch Linux)
KDE Plasma Version: 6.7.3
KDE Frameworks Version: 6.28.0
Qt Version: 6.11.1

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2026-07-26 21:14:05 UTC 
Same root cause as Bug 521900.

*** This bug has been marked as a duplicate of bug 521900 ***