That sounds like the sddm display manger crashes on startup. Please boot back with the default systemd option, wait until the graphical system stops trying to start (blinking text cursor), then press Ctrl+Alt+F2. You should see a "login:" prompt where you can log in instead. In this text mode, run
sudo journalctl -b > journal.txt then reboot back with upstart, and attach "journal.txt" in your home directory here. Thanks! ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509762 Title: After upgrade to Ubuntu 15.10, Systemd fail to boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1509762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs