I have been using ATI's non-free drivers in the past so this week was the first time I have had a chance to install the Nvidia non-free drivers on FC4 x86_64. While I was able to setup it up without problems, one issue puzzles me. Their instructions are to disable the dri module. Does this mean the Nvidia non-free drivers don't use dri like the ATI non-free drivers do? Is there any opengl performance impact from this? Thanks in advance for any clarifications. Jack