9.10 to 10.04 lost video signal

[dsiddens]

I had a working box with 9.10 and upgraded via online connection. The machine has NVidia. The download/upgrade passed without mishap. But at reboot the monitor displayed “no signal”. I did this process twice: install 9.10 got a working system. Upgraded to 10.04 and lost video signal. Black screen.
Help please. I’m a GUI guy.

[djshortsleeve]

I think I have a similar issue. I successfully installed but have no video.

[mörgæs]

dsiddens, why do you install and then upgrade? It is much safer to just install the release that you want.
http://www.releases.ubuntu.com

If there are problems with Nvidia after a fresh install, you could try to add boot options.