X Error of failed request:  GLXUnsupportedPrivateRequest
  Major opcode of failed request:  148 (GLX)
  Minor opcode of failed request:  16 (X_GLXVendorPrivate)
  Serial number of failed request:  1820
  Current serial number in output stream:  1822
xterm:  fatal IO error 32 (Broken pipe) or KillClient on X server ":2.0"
The application 'cgwd' lost its connection to the display :2.0;
most likely the X server was shut down or you killed/destroyed
the application.