I updated from 15.04 to 15.10. When I start up the computer I see
Error: no video mode activated
After this, it goes to the Ubuntu startup page with the logo but after load shows me a list of services that have started and stays on that screen. I am getting very frustrated. Ubuntu left a message saying that 15.04 will no longer receive updates and I should switch, and this version is broken upon arrival.
I can use the Ctrl+Alt+F1 command to put in commands but have no idea where to start. Please help.