ubuntu 启动GNOME设置守护进程时出错

启动GNOME设置守护进程时出错
主题、声音或者背景设置等可能不会正常工作。
最后的错误信息是：
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

GNOME在您下次登录时仍将试图重启动设置守护进程


今天早上开机，在登录后弹出上面的错误提示。昨天用还好好的，应该是我安装了什么软件造成的。回忆下昨天对系统进行了哪些改动，安装了apache、xinetd、，使用xinetd绑定vsftpd、apache（没完成）、设置了静态IP。
错误提示是守护进程出错，于是我进入终端［Ctrl+Alt+F1］，检查了/var/log/daemon日志文件并和前天的对比了一下，除了少了dhcp(自动分配IP，注.我已经手动设置了ip)服务，没有发现什么异常。
难道是网络配置的问题？再打开/etc/network/interfaces文件，看到少了一项lo的配置！很显然是我在设置静态ip的时候犯了个低级错误。
设置前：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

设置后：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto eth0
iface eth0 inet static
address 192.168.1.254   
netmask 255.255.255.0
gateway 192.168.1.100

正确的应该是：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.1.254   
netmask 255.255.255.0
gateway 192.168.1.100

//重新启动网络服务
$ sudo /etc/init.d/networking restart
//重新启动GNOME
$ sudo /etc/init.d/gdm restart
搞定！