The X server (your graphical interface) cannot be started. It is likely that it is not set up correctly. You will need to log in on a console and rerun the X configuration application, then restart GDM.
Ezin da X zerbitzaria abiarazi (zure interfaze grafikoa). Agian ez da behar bezala konfiguratuta egongo. Kontsolaren saioan sartu eta X konfigurazio-programa berriro exekutatu beharko duzu. Ondoren, berrabiarazi GDM.