Description of problem:
The Redhat supplied kernels do not come with the AGP modules, so accelerated X
with the Free drivers does not work.
Version-Release number of selected component (if applicable):
(any of the new kernels)
Steps to Reproduce:
1. Allow Yum to install a RedHat kernel
2. Boot into that kernel
3. Start X
The radeon driver cannot find the AGP modules, so it refuses to load DRI.
The AGP modules should be present.
They're built in to the kernel (non-modular).
Your problem is elsewhere.
(dmesg | grep -i agp will show that they're present)
Make sure you have the 686 kernel installed, and not the i586 one (There was an
anaconda bug in FC6 that installed the wrong arch). The 586 kernel doesn't have
all the AGP modules (just ones that would appear on 586 platforms).
See http://fedoraproject.org/wiki/Bugs/FC6Common for more info.
That was it - wrong sub-arch on the kernel.