Jitspoe, QuDos build works fine for me. I'll try to dig up some of the fixes I've found for problems with it, the main problem was audio. I use SDL Quake 2 when I play normal Quake 2 and mods for it, I have no issues at all with it and you could use it's audio, who can't get SDL in Linux? As far as OpenGL errors, I've only had them when not using nvidia drivers on my nvidia card.
I get 1000 fps when not near entities and around 250 fps when in the water in bombsaway.