If you're stuck on a black screen instead of the login screen then it's possible the system has booted to the wrong VT. To work around that try:
Ctrl+Alt+F4, Ctrl+Alt+F1, and then wait a few seconds
If you're stuck on a black screen instead of the login screen then it's possible the system has booted to the wrong VT. To work around that try:
Ctrl+Alt+F4, Ctrl+Alt+F1, and then wait a few seconds