I got the same problem on upgrading from 14.04 to 14.10. On dmesg I see: [ 43.323648] systemd-logind[2817]: Failed to start unit user@111.service: Unknown unit: user@111.service [ 43.323654] systemd-logind[2817]: Failed to start user service: Unknown unit: user@111.service [ 43.326729] systemd-logind[2817]: New session c1 of user lightdm. [ 43.326748] systemd-logind[2817]: Linked /tmp/.X11-unix/X0 to /run/user/111/X11-display. [ 44.387104] init: plymouth-stop pre-start process (4632) terminated with status 1 [ 57.998337] audit: type=1400 audit(1414195441.914:38): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=4840 comm="apparmor_parser" [ 57.998349] audit: type=1400 audit(1414195441.914:39): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=4840 comm="apparmor_parser" [ 58.011666] audit: type=1400 audit(1414195441.930:40): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="third_party" pid=4840 comm="apparmor_parser" [ 67.951030] systemd-logind[2817]: Failed to start unit user@1000.service: Unknown unit: user@1000.service [ 67.951036] systemd-logind[2817]: Failed to start user service: Unknown unit: user@1000.service [ 67.953605] systemd-logind[2817]: New session 1 of user ldavim. [ 67.953621] systemd-logind[2817]: Linked /tmp/.X11-unix/X0 to /run/user/1000/X11-display. [ 67.956202] systemd-logind[2817]: Existing logind session ID 1 used by new audit session, ignoring [ 67.958750] systemd-logind[2817]: New session c2 of user ldavim. [ 76.073380] init: anacron main process (3189) killed by TERM signal
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1240336 Title: Not authorized to perform operation / Unable to determine the session we are in: No session for pid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1240336/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
