So I upgraded from 14.04 to 16.04 and at first I got a login screen which was just stuck in a loop. Now I only get a black screen.
I can switch to the command line and log in and it says 16.04 but when I ran sudo apt-get update to look for any more updates it can't reach any ftp servers. I do have an nvidia graphics chip so I know they have problems sometimes but I'm a bit stuck as to where to start - so many slightly different answers around. My other ubuntu machine (laptop) upgraded just fine and is online with no worries.
Can anyone help me troubleshoot further or point out the most relevant existing answers here? Thanks!