I also used live image and after install of unity8-desktop-session-mir and login to Unity 8 ended up with black screen.
Then I switched to TTY1 and restarted lightdm and when it restarted I was on Unity 8 greeter. The session started but it was totally unusable. The Scopes displayed only webbrowser-app , system settings, checkbox and app store. When I tried to start system settings it only displayed a small window for a very, very short time and disappeard. The same with webbrowser. Also the fonts display was terrible. Mouse cursor was very slow. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1539811 Title: Unity8-mir session fails to load on login; lightdm restart required (live USB) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity8-desktop-session/+bug/1539811/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs