delta@clint:~/OSG_OP_OT-1.2/OpenSceneGraph$ glxgears
X Error of failed request:  GLXBadDrawable
  Major opcode of failed request:  143 (GLX)
  Minor opcode of failed request:  5 (X_GLXMakeCurrent)
  Serial number of failed request:  23
  Current serial number in output stream:  23