There were lots of suggestions and answers I found regarding this matter but the one that worked on my end was a very simple one. It was all about the screen display resolution. My laptop has a standard 1366 x 768 (16:9) resolution. For some reason this was changed to 1360 x 768.
change is very minor but this, in fact, was the cause on why I get a
black/blank screen when I logout. After restoring to the original
resolution, everything is now back to normal and working as it should
Go To System Setting