https://bugs.freedesktop.org/show_bug.cgi?id=27221
--- Comment #11 from smoki smoki00790@gmail.com --- Render correctly here and i tested two year ago performance with different drivers and was OKish for KMS:
http://www.phoronix.com/forums/showthread.php?68319-Radeon-Gallium3D-A-Half-...
And it is practicaly the same with current git mesa 10.2 :).