Possibly related: "OpenGL yield behavior" in http://us.download.nvidia.com/XFree86/Linux-x86_64/455.38/README/openglenvvariables.html
Possibly related: "OpenGL yield behavior" in http:// us.download. nvidia. com/XFree86/ Linux-x86_ 64/455. 38/README/ openglenvvariab les.html