I found the answer here: http://richg42.blogspot.de/2014/05/the-truth-on-opengl-driver-quality.html http://richg42.blogspot.de/2014/05/the-truth-on-opengl-drive

I found the answer here: http://richg42.blogspot.de/2014/05/the-truth-on-opengl-driver-quality.html http://richg42.blogspot.de/2014/05/the-truth-on-opengl-drive... Nvidia is strong-arming developers not to support Mesa because they are afraid of open drivers. Nvidia is afraid of Mesa.