I am running the 8,1 Macbook Pro. It has the integrated Intel HD 300 gpu. I've noticed the graphics performance is drastically worse in Ubuntu than in OS X. I tested this using the bullet physics library (http://bulletphysics.org/wordpress/) demos. In OS X, they all run flawlessly and smooth. In Ubuntu on the same laptop they're unusable. I can't properly interact with them because they hang so much and the framerate is so low.
Is this a driver issue? Any fixes or possibility of this being fixed?
I was planning on working with some bullet stuff, but the performance is much worse than is reasonable.