amonkey@ein:~$ Xgl :1 -fullscreen -ac -accel glx:pbuffer -accel xv:fbo
_XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6
_XSERVTransOpen: transport open failed for inet6/ein:1
_XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6
X Error of failed request:  BadLength (poly request too large or internal Xlib length error)
  Major opcode of failed request:  143 (GLX)
  Minor opcode of failed request:  1 (X_GLXRender)
  Serial number of failed request:  97
  Current serial number in output stream:  98