Ubuntu升级后进入不了图形界面
更新Ubuntu后进入不了图形界面，用命令行登陆后执行startx, 提示：
Fatal server error:
Server is already active for display 0
If server is no longer running ,?remove /tmp/.X0-lock and start again
?
解决方法是重新设置xserver
sudo /etc/init.d/gdm stop?
sudo dpkg-reconfigure xserver-xorg?
sudo gdm start
