Reading your lightdm log, it seems LightDM cannot load seat0 for your case.
Do you have any custom config file under /etc/lightdm/lightdm.conf.d (or /etc/lightdm/lightdm.conf)? Specially, do you set option "start-default- seat=false" explicitly? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1365039 Title: Could not get session id for session To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1365039/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs