chronos@localhost ~ $ sudo startxfce4
Cannot connect to extension, retrying... Error: not connected. Cannot connect to extension, retrying... Unable to start display, make sure the crouton extension is installed and enabled, and up to date. (download from https://goo.gl/OVQOEt) Running exit commands... /usr/bin/xinit: connection to X server lost waiting for X server to shut down (EE) Server terminated successfully (0). Closing log file.