Could you please test this in lightdm 1.1.6 (precise)? There has been a change to the way PAM is handled that should resolve this issue.
** Changed in: lightdm (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/837285 Title: lightdm assert failure: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/837285/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs