I updated a bunch of packages today (Fedora 8) and OUCH! I can't get a display on my Sapphire X1650Pro card with either the radeon or radeonhd driver. What hit me?
xorg-x11-drv-ati-6.7.197-1.fc8 (from updates-testing)
I know the monitor is OK because the screen lights up during the boot sequence, and it's working now on a GeForce 7600GS with the nouveau driver.
Before these updates, I was running pretty happily with the radeon driver, 6.7.196-something. I have the xorg.conf and Xorg.0.log saved from attempts with both the radeon and radeonhd drivers.
On the bright side, it appears nouveau now has some Xvideo support, I'll have to play with that.
I am finally running my X1650 Pro card successfully again. I removed the F8 updates-testing versions and re-installed the full distribution version. I also noticed an Xserver update a few days ago, I wonder if that had some relevance.