you are in Alt+Ctrl+F7 screen.
doing init 3 will kill this screen (your X windows)

and you will see a black screen.
the text - mode screens Ctrl+Alt+F1
....................
....................
Ctrl+Alt+F6
will work properly.
if you just want a text - mode screen just do Ctrl+Alt+F1. (no need to go to init 3)
if you want only the texmode (to upload X-windows, to install a driver or something) do init 3 in a console as root
and then press Ctrl+Alt+F1,
or press Ctrl+Alt+F1, login as root and then do init 3.