https://bugs.freedesktop.org/show_bug.cgi?id=36812
--- Comment #7 from Tom Stellard tstellar@gmail.com 2011-05-31 02:21:06 PDT --- With MESA_GLSL=nopt the code that was changed by the bisected commit is not being executed, so I think the real problem might be somewhere else. I guess you could try bisecting again with MESA_GLSL=nopt and maybe you'll come up with a different bad commit.