X Rezise and Rotare (xrandr) is a utility available in your Linux system for reseting and resizing your screen resolution. It is a command line utility. so if your display disapperaed ?? No problem you can do it from a Terminal (Press Ctrl+Alt+f1).
"How to Solve Screen Resolution Problem in Ubuntu / Debian with Command Line Utility xrandr
How to Solve Screen Resolution Problem in Ubuntu / Debian with Command Line Utility xrandr: "
