Radeon Open-Source Performance Over Three Years, Compared To Legacy Catalyst
Xonotic with low image quality settings now yielded results on Ubuntu 14.04 that are close to Ubuntu 11.10 when using the AMD Catalyst Legacy driver.
As the visual intensity increased for Xonotic, the Radeon R600 Gallium3D performance fell much quicker than Catalyst...
When hitting ultra image quality settings, the Catalyst driver on Ubuntu 11.10 was about 35% faster than Ubuntu 14.04 with its stock GPU driver stack.