I'm running Ubuntu 5.10 (Breezy). I followed the install instructions, but when I try to run the game I just get a black screen and mouse pointer. I can't do anything in Gnome, after this, unless I switch to a console and kill Nexuiz. Then, Gnome comes back with a resolution of 800x600. Anyhow, the main problem is that the game won't load properly.
System specs:
P4 1.8 GHz
512 MB RAM
Nvidia GeForce FX 5600 (256 MB)
Matsonic motherboard with SiS chipset
kernel 2.6.12-10-686 (Ubuntu)
Nvidia glx drivers (Ubuntu)