Same problem here on a Dell XPS 13. The following three proposed solutions did _not_ work:
* Switch from "rgb" (="subpixel"?) anti-aliasing to "grayscale".
* Uninstall xserver-xorg-video-intel to let the modesetting driver take over.
* Ctrl+Alt+F1 then Ctrl+Alt+F7 (btw, characters in virtual terminals Ctrl+Alt+F1 to F6 are gone as well).
What _does_ work is boot Ubuntu's 3.8.0-35-generic kernel rather than 4.2.0-36-generic or higher (don't have anything in between). But of course that's not satisfactory.
Same problem here on a Dell XPS 13. The following three proposed solutions did _not_ work:
* Switch from "rgb" (="subpixel"?) anti-aliasing to "grayscale".
* Uninstall xserver- xorg-video- intel to let the modesetting driver take over.
* Ctrl+Alt+F1 then Ctrl+Alt+F7 (btw, characters in virtual terminals Ctrl+Alt+F1 to F6 are gone as well).
What _does_ work is boot Ubuntu's 3.8.0-35-generic kernel rather than 4.2.0-36-generic or higher (don't have anything in between). But of course that's not satisfactory.