I just upgraded from Ubuntu 16.04 LTS to 18.04. After rebooting, I get my normal login screen, which still says "Ubuntu 16.04". I click my name and enter my password, and so far get one of the three following:
- The login box vanishes, but the screen remains the same (with my desktop background and the Ubuntu 16.04 text and nothing else). This stays for minutes with nothing happening.
- I get the login prompt back.
- I get a black screen.
What would be my next step? Will I need to make a clean install?