Hello,
some time ago the users started to observe strange issue. When they try to unlock the kscreenlocker after switching consoles by Atl+Fx key even the type correct password, it fails and this is found in the logs: kscreenlocker_greet[109438]: pam_sss(kde:auth): received for user username: 4 (Chyba systému), which means system error. I cannot see any other log with more details on this. The second attempt works. It is hard to say when the issue started, because longer time we were thinking users just type wrong password. We are going to elaborate more on this. We are unsure whether the console switching is the necessary condition or only waiting for longer time is sufficient. Apparently when I try to unlock after several minutes, it works on a first attempt.
Thanks
Marek