I was having the issue of a black screen on Ubuntu restart and startup. It seems like my monitor is somehow disconnected when I start Ubuntu because I get 'No Signal Detected'.
I started following this guide on how to fix it but whenever I change anything in the Grub Boot Menu like
nomodeset then press Ctrl + X or F10 to boot, it just goes to this screen:
Then stays like this. Doesn't respond to any keys.
The only way to boot is to turn off the computer when the monitor turns off then turn the computer back on, getting to the following screen and selecting 'Ubuntu'.
I even tried reinstalling and have the same issue.
Can anyone help?