Marcelo's dashboard

Actually, this problem with black screen happened with me too.
I am almost sure that bumptop caused it.

Today I logged remotely into my computer using windows remote desktop and the bumptop process occupied all processing of one of the cores of the computer. Then I killed the process and everything was fine.
Later (in the same login session), I logged locally and restarted bumptop and the screen went black.

The black screen continued after reseting manually the computer and before I could get to the login screen, as described by colin.

I used remote desktop again, logged in, killed bumptop, and changed the color depth of the screen and the screen went back to normal.

After that, I restarted bumptop and the problem DIDN'T repeat.