zhouchao@zhouchao:~$ nautilus

(nautilus:4653): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed

(nautilus:4653): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
无法注册应用程序: 已到超时限制

(nautilus:4653): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed

(nautilus:4653): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(nautilus:4653): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
zhouchao@zhouchao:~$ nautilus
nautilus nautilus-connect-server
nautilus-autorun-software

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网上搜到了解决的方法，试了下，可行
How to restart nautilus without logging out?

First, type the following in your terminal to quit nautilus:

nautilus -q or killall nautilus

Then, open nautilus via Unity menu (press the Super key) or using the run command (Alt+F2)

http://askubuntu.com/questions/19979/ho ... ogging-out

更新能解决很多问题