For me, I installed libpam-mount explicitly long ago in order to auto mount encfs volumes on login. I don't have sadms installed, but here's the policy run anyway as requested by TJ:
$ apt-cache policy sadms sadms: Installed: (none) Candidate: 2.0.15.repack-0ubuntu2 Version table: 2.0.15.repack-0ubuntu2 0 500 http://us.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927828 Title: sudo: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/sudo/+bug/927828/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs