chronos@localhost ~ $ sudo startxfce4
で起動できずエラー
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.
これみたらcrouton
をいれなおす。
https://github.com/dnschneid/crouton/issues/1833
これを一旦消してまた入れた・・。
crouton integration - Chrome ウェブストア
OK