Actually it seems like the bug is in pam or similar, not in lightdm: I also get this message when attempting to use sudo, which is a completely different program using pam.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/837285 Title: lightdm assert failure: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. Status in “lightdm” package in Ubuntu: Confirmed Status in “libpam-mount” package in Debian: Unknown Bug description: Logged in with GNOME as session. ProblemType: Crash DistroRelease: Ubuntu 11.10 Package: lightdm 0.9.3-0ubuntu8 ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3 Uname: Linux 3.0.0-9-generic x86_64 NonfreeKernelModules: nvidia Architecture: amd64 AssertionMessage: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. CrashCounter: 1 Date: Tue Aug 30 12:18:08 2011 ExecutablePath: /usr/sbin/lightdm InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429) ProcCmdline: lightdm ProcEnviron: PATH=(custom, no user) Signal: 6 SourcePackage: lightdm StacktraceTop: __GI___assert_fail (assertion=0x7f0c2294a63c "user != ((void *)0)", file=<optimized out>, line=417, function=<optimized out>) at assert.c:81 ?? () from /lib/security/pam_mount.so pam_sm_close_session () from /lib/security/pam_mount.so ?? () from /lib/x86_64-linux-gnu/libpam.so.0 ?? () Title: lightdm assert failure: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. UpgradeStatus: Upgraded to oneiric on 2011-08-19 (10 days ago) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/837285/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
