Theres a lot of complaining about missing GLX modules for your xserver. Can you run \'xdpyinfo\' and confirm that GLX is not present in the list of Extensions?
If not, adding this in will probably be a good thing, add
Load \"glx\"
to the Module section in your xserver config file ( called xorg.conf if you are using Xorg-X11 or XF86Config if you are using XFree86 ), and restart X.