What's ls -l /etc/shadow look like? /etc/shadow should be 640, owner root, and group shadow.
I only ask because I ran into the same issue after "exploiting myself" with the recent pam_motd vulnerability. My PoC (http://twitter.com/jonoberheide/status/18009527979) changed the ownership of /etc/shadow and upon changing it back (I think I did chown root:root instead of root:shadow), I had the same issue of not being able to log in via the screensaver and the same "check pass; user unknown" error message (unix_chkpwd can't read the file if its not shadow group readable). I would blame it on the recent vulnerability...except that your initial bug report pre-dated the vulnerability announcement. :-) -- Password does not unlock screen https://bugs.launchpad.net/bugs/600631 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
