With 184.108.40.206 no binary driver work. The 87xx worked with kernel 220.127.116.11. Even then, on a given UT2004 demo (self made), I got 8 fps avg, whereas with kubuntu 32 bits running I don't know what kernel version and NVidia drivers 87xx I got 85 fps avg. Even if they ran, it was far from playable. I haven't seen a lot posts about performance problem on amd64, and if it was a wide spread problem, then why would the developers of UT2004 bother to include the 64bits version?
Oh! I not just UT2004! I also get sucky performance with sauerbraten
. Most people I have seen reporting performance problems didn't have GLX configured properly. I only I had another graphic card, I could rule out the video card.