GDM出现问题如何解决!

[haphap]

现在开机无法直接进入X,要在shell下用startx才可以(直接X不行!),
而且配置GDM的时候出问题:
$ sudo gdmsetup
Failed to connect to socket, sleep 1 second and retry
Trying failed command again. Try 2 of 5.
Failed to connect to socket, sleep 1 second and retry
Trying failed command again. Try 3 of 5.
Failed to connect to socket, sleep 1 second and retry
Trying failed command again. Try 4 of 5.
Failed to connect to socket, sleep 1 second and retry
Trying failed command again. Try 5 of 5.
Command failed 5 times, aborting.
无法访问 GDM 配置文件。

哪位能帮帮忙解决一下!