VGL_DRAWBLE=pixmap vglrun glxgears

[VGL] NOTICE: Automatically setting VGL_CLIENT environment variable to
[VGL]    192.168.0.173, the IP address of your SSH client.
failed to create drawable
X Error of failed request:  BadAlloc (insufficient resources for operation)
  Major opcode of failed request:  153 (GLX)
  Minor opcode of failed request:  27 (X_GLXCreatePbuffer)
  Serial number of failed request:  29
  Current serial number in output stream:  31