-79- I just upgraded from IRIX 5.2 to 5.3. Why does my PI or VGX say "extension GLX missing on display :0.0"?

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Subject:   -79- I just upgraded from IRIX 5.2 to 5.3. Why does my PI or
                VGX say "extension GLX missing on display :0.0"?
Date: 14 May 1995 00:00:01 EST

  Mark Kilgard of SGI <mjk@woodsy.asd.sgi.com> explains:
  /usr/lib/X11/dyDDX/glx.so, without which OpenGL doesn't work, is
  missing due to peculiar installation circumstances. (See the
  INSTALLING section of the SGI admin FAQ for general comments on that
  sort of thing.) Either remove the 5.2 gl_dev.sw.glprof subsystem
  *before* upgrading, or reinstall the 5.3 x_eoe.sw.Server subsystem
  *after* upgrading, and reboot.  If you do the latter, be sure to "set
  neweroverride on" in 'inst'.