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.
解决方法
退出root账户：exit
以：su - （进入root）
(process:6471): GConf-WARNING **: 等类似错误
原文：http://blog.csdn.net/muyang_ren/article/details/39299093