{nav icon=home, name=Main Page > icon=wrench, name=Troubleshooting > GNOME GUI not starting} GNOME display manager (login screen) does not start, only black screen is showed --- == Problem == System successfully booted, but GNOME Display Manager (gdm—login screen) did not start, textual login prompt is displayed: {F53541, size=full, alt=tty1} == Solution == In some cases it might help to reconfigure the GNOME login manager. Login with your username/password at the prompt: {F53543, size=full, alt=tty2} and run the following command: {icon terminal}`sudo dpkg-reconfigure gdm3` Restart to see if it helped. == See also == If the problem happened after a system upgrade, you can try [[Troubleshooting/Broken upgrade]].