I found, after upgrading from Fedora 8 x86_64 to Fedora 10 x86_64, that the radeon driver support for my Radeon X1650 Pro graphics card seemed to work well except for one major problem. The X server seemed to have issues with mode resets at random intervals. The screen goes black and then comes back as before. The X11 log file doesn't show a complete X server restart but just mode related lines repeating. Fortunately the current Catalyst 9.1 based flgrx packages are behaving well at the moment so I was able to switch over to those. Jack