进不了gnome界面！

zt2620zt

我的机器不知道装好后重启就进不了gnome了！刚进入的时候就挂在那不动了！在终端下查看记录
.......................................
Using config file: "/etc/X11/xorg.conf"
(WW) RADEON: No matching Device section for instance (BusID PCI:1:0:1) found
Could not init font path element /usr/X11R6/lib/X11/fonts/local, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/CID, removing from list!
不知道这是怎么回事啊！怎么解决啊！