今天安装完CentOS-6.6-x86_64-minimal以后，想给它装个桌面，于是运行了yum groupinstall “Desktop”，按理说，应该是桌面环境应该可以正常运行了。但当运行start命令时，却遇到了如下错误：
Fatal server error:
.......
no screens found
(EE)
Please consult the CentOS support
at http://wiki.centos.org/Documentation
for help.
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE)
Server terminated with error (1). Closing log file.
解决办法：
$ yum groupinstall -y 'X Window System'
$ rm -rf /etc/X11/xorg.conf
$ Xorg -configure #会提示生成了新的配置文件xorg.conf.new
$ cp ~/xorg.conf.new /etc/X11/xorg.conf
$ startx