I just tried a bit of "surgery" - I made a new installation (from the scratch) into Virtualbox and took all contents of /etc/pam.d and merged it into my main system - the one with this bug - thus overwriting files with new ones but keeping all additional files - not from the system itself - untouched.
And guess what? Everything seems to work WITHOUT these "workarounds" tried before. This implies to the difference in some other file in /etc/pam.d, which is "left over" from 13.04 and causing this problem - other file than /etc/pam.d/lightdm. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in 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 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
