If you want to try to reconstruct the sudo error you have to run sudo twice, though:
sudo test [here you will get no error message] sudo test [here you will get the error message] Seems like the error is related to the mechanism that allows you to use sudo without having to enter the password again every time if the time span that has passed since the last use of sudo isn't too big. ** Bug watch added: Debian Bug tracker #648698 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648698 ** Also affects: libpam-mount (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648698 Importance: Unknown Status: Unknown -- 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