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.
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.