https://bugs.freedesktop.org/show_bug.cgi?id=39320
--- Comment #1 from Marek Olšák maraeo@gmail.com 2011-07-18 18:18:00 PDT --- Could you please attach an apitrace file?
Apitrace can record and replay OpenGL commands. You can get it here: https://github.com/apitrace/apitrace