我尝试升级到 14.04，一切正常，没有错误，但重启后系统崩溃了。我收到此错误消息：
mount: mounting /dev/loop0 on /root failed: Invalid argument
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory
mount: mounting /proc on /root/proc failed: No such file or directory
Target filesystem doesn't have requested /sbin/init.
No init found. Try passing init= bootarg
BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(inittramfs) _
我在双启动的 Asus UX31E 机器上运行 Linux。W7 仍可正常启动。