[cluster@node0 wall]$ glxinfo | egrep "glx (vendor|version)"
server glx vendor string: SGI DMX/glxProxy
server glx version string: 1.3 DMX 3 back-end server(s)
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
[cluster@node0 wall]$ ls -lah /usr/X11R6/lib/libGL.so
lrwxrwxrwx 1 root root 26 Mar 28 13:18 /usr/X11R6/lib/libGL.so -> /usr/lib/libGL.so.96.43.05
[cluster@node0 wall]$ ls -lah /usr/X11R6/lib/libGL.so.1
lrwxrwxrwx 1 root root 26 Mar 28 13:18 /usr/X11R6/lib/libGL.so.1 -> /usr/lib/libGL.so.96.43.05
[cluster@node0 wall]$ ls -lah /usr/lib/libGL.so.1.2
lrwxrwxrwx 1 root root 26 Mar 28 13:18 /usr/lib/libGL.so.1.2 -> /usr/lib/libGL.so.96.43.05