Savage and opengl problem

[the.masch]

hello, I'm using X server and savage video card and I thing I have a view
port problem or something like that, because when I run some opengl
application without a desktop I saw a black screen, but when I run the same
application in fluxbox the application run fine.
I have DRI and VBE working.

What do I need to setup in my X server?

Salud2..
masch...