I have kUbuntu 20.04LTS installed on a Dell Precision laptop.
After some update within the last three months, I am no longer able to unlock the greeter screen after it locks, either by a screen timeout or manually locking. When this occurs, my password is never accepted, and the system log shows, for example:
10/12/22 2:36 PM practical unix_chkpwd[75912] check pass; user unknown
10/12/22 2:36 PM practical unix_chkpwd[75913] check pass; user unknown
10/12/22 2:36 PM practical unix_chkpwd[75913] password check failed for user (ehildum)
10/12/22 2:36 PM practical kcheckpass[75709] pam_unix(kde:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0 ruser= rhost= user=ehildum
10/12/22 2:36 PM practical kcheckpass[75709] Authentication failure for ehildum (invoked by uid 1000)
When the problem occurs, I can select "Switch User" on the greeter screen and then log in successfully, but any windows/applications that were open are now closed, dumping unsaved changes.
Of possible relevance:
- My company requires me to connect to their VPN using Cisco AnyConnect, though the problem occurs whether or not I am or have been connected during a session.
- I have the NVidia proprietary video drivers installed (from the Ubuntu repository).
Any pointers on this would be much appreciated.
