su
yum reinstall mesa-libGL
yum update kernel
rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
yum install kmod-catalyst xorg-x11-drv-catalyst xorg-x11-drv-catalyst-libs.i586 (.64)
rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
mv /boot/initrd-`uname -r`.img /boot/initrd-`uname -r`.img.backup
mkinitrd -v /boot/initrd-`uname -r`.img `uname -r`
aticonfig --set-pcs-str="DDX,EnableRandR12,FALSE"
reboot
исползованы материалы форумов http://www.fedoralinux.ru/forum/viewtopic.php?pid=10794 и http://forums.fedoraforum.org/showthread.php?t=155503
Вопросы задавать туда!