Comment 34 for bug 1990750

'black screen', 'ubuntu', 'blinking cursor', 'nVidia' do not describe a bug, but instead are common characteristics of many thousands of different bugs.

Although bug 1975650 doesn't seem to describe a black screen problem, if you find that reinstalling the driver fixed the issue (comment #25) then we should keep this as a duplicate of bug 1975650.

One possible reason for a black screen is that Nvidia systems are known to sometimes boot to the wrong VT, or even log into the wrong VT. The workaround for that is to use Ctrl+Alt+F1-FN to find the correct screen. Like in bug 1960868 and bug 1878838.

If your black screen problem persists after reinstalling the Nvidia driver, or if you would like to continue debugging that issue, then please use 'journalctl -b-1' or similar to collect a full system log from when the black screen was occurring.