Make sure you have at least 11.1, and it was installed right, and you built the kernel module and its being loaded before X starts. Your 2D and 3D acceleration is dead, and OpenCL isn't going to work either. And since you'd be on 11.1 or later, make sure you're using SDK 2.4
Thanks for the tips. I have been a bit busy lately, so it might be a day or two before I get to this. Meanwhile, it's limping along CPU-mining :-/