Fedora 14 Installation Guide
Pre-built packages from RPMFusion
This is easier than building the driver from AMD as you don't need to worry about passing kernel options via GRUB, configuring DKMS or rebuilding the kernel module every time you do a kernel upgrade.
Clean up previous AMD-supplied driver installation
If you're coming from the AMD-supplied driver to RPMFusion's driver, you'll need to reinstall this package as the AMD driver changes files it contains.
su - yum reinstall mesa-libGL
There are instructions on http://www.rpmfusion.org/ but this should do it.
su - rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
Install AMD driver
This procedure is the same for 32-bit and 64-bit, yum will automatically install the correct driver and libs for your architecture.
su - yum install akmod-catalyst xorg-x11-drv-catalyst xorg-x11-drv-catalyst-libs
Note that there are individual "kmod-catalyst-" packages which supply kernel modules for specific Fedora kernel versions. If you are using these and you upgrade the kernel without upgrading the kmod package, you'll revert back to the free "radeon" graphics driver. Sometimes there is a day or so between Fedora upgrading their kernel and RPMFusion building a new kmod package.
The "akmod-catalyst" package we install automatically builds a new kernel module at boot-time when the kernel is upgraded, so you never have to worry about this.
Offical AMD Driver
Note: This procedure is untested.
Preinstall required packages
The script from AMD builds a kernel module, so we're going to need to install some development packages.
su - yum install kernel-devel gcc
If you're on 64-bit you may also have to install this package too. (you do for 64-bit nVidia drivers so I had it installed anyway)
su -c yum install glibc-devel
Download the appropriate driver from http://support.amd.com/
It will be called something like ati-driver-installer-version.run.
Run the file as root in the "sh" shell.
su - chmod +x ati-driver-installer-version.run sh ./ati-driver-installer-version.run
Generate a new xorg.conf
This should do fine for most people.
su - aticonfig --initial -f
If you have multiple monitors or X2 cards then you'll need to do some other stuff, check one of the Ubuntu guides for the correct syntax.
GRUB boot config
Ensure there's a radeon.modeset=0 entry on the end of your kernel line in /boot/grub/menu.lst file, you could also use nomodeset here.
I expect the AMD install script will do this for you.
title Fedora (22.214.171.124-103.fc14.x86_64) root (hd0,0) kernel /vmlinuz-126.96.36.199-103.fc14.x86_64 ro root=UUID=blah LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet radeon.modeset=0 initrd /initramfs-188.8.131.52-103.fc14.x86_64.img