它一直显示错误，无屏幕和服务器错误。请帮忙。我尝试过重新启动并再次执行此操作，但没有成功。
这就是我的屏幕上显示的内容。
Fatal server error: no screens found (EE) Please consult the The X.Org
Foundation support at wiki.x.org for help.
(EE) Please also check the log file at "/tmp/Xorg.crouton.1.log" for additional information.
(EE) Server terminated with error (1).
Closing log file. /usr/bin/xinit: giving up /usr/bin/xinit: unable to connect to X server:
No such file or directory /usr/bin/xinit: server error Unmounting /mnt/stateful_partition/crouton/chroots/precise