While I'm not suggesting that you don't need GLX - what is it about your machine that requires GLX ?
The absence of error messages :-)
krootview and kdmgreet crash when I try to log in with kdm, if I don't have the GLX module specified in XF86Config-4. Google hits seem to indicate that there is a strong link to the nvidia driver here. I haven't tried the 'nv' driver, nor gdm/xdm.
When I get more time, I'll try some options ... :-)
-jim
