Proprietary drivers (current) for vidyuhi Radeon (fglrx) supported video card series Radeon HD 2000 and above. If your vidyuhi old, then you have to use the driver, who stuck by default, and then you can not read. Otherwise, start the console and drove off. Drava for CentOs-and 6.6 are in the repository ELREPO, you can turn it on

rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

     Installation on x64 systems such

sudo yum -y install kmod-fglrx fglrx-x11-drv fglrx-x11-drv-32bit.x86_64

     Run the autoconfiguration

aticonfig --initial

    And restarts the system

reboot

Like this.