There is a mismatch between the way the X server and GLX library calculates the image size for format GL_DEPTH_STENCIL(|_NV|_EXT) See https://bugs.freedesktop.org/show_bug.cgi?id=30102 Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
This extension was never enabled in any driver.