I'm using Kubuntu 19.10. During the login screen, I've pressed `Ctrl`+`Alt`+`F3` to fire up the terminal.

According to multiple articles, `Ctrl`+`Alt`+`F7` should return me to the previous, GUI-based login screen after I'm finished with the terminal.

Instead, the entire screen goes black, with only an `_` blinking in the upper left. I can press `Ctrl`+`Alt`+`F3` again,

How can I remedy this issue?