I fried my old CPU while benchmarking Traffic Server (yeah, it's that fast ...), so I spent most of the day replacing the mother board / CPU. I figured I'd take the opportunity to ugprade to Fedora Core 12 as well. This mostly worked well, with one exception: FC12 now comes with the OpenSource nvidia drivers, and they are slow. Unfortunately, these drivers also conflicts with the nVidia closed source drivers (which I install from source), causing the installation to fail. But, with a few changes in my system configs, I worked around it.
First, change /etc/grub.conf and edit the "kernel" line, to include something like
Secondly, edit /etc/modprobe.d/blacklist.conf and add a line
I'm not sure why both are necessary, maybe I did something wrong and you only need one or the other. Let me know if that is the case, I'm happy with what I got, and not wasting any more time on it.