Both of my installations were upgraded by means of Update Manager in usual way, however one of them did not show this problem. Both are 64-bit.
About this reference to previously mentioned archlinux thread - it looks quite obvious, that problem poassaibly had some relation to lightdm, because it was present without logging in (inability to chutdown or restart). This maybe screwed up user session with "no session for..." messages and no visible sessions for loginctl. This workaround fixed both problems. -- 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.... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/policykit-desktop-privileges/+bug/1240336/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
