Ubuntu 14.10 Offers AMD Radeon Driver Performance Improvements
The Unigine Sanctuary performance improvements on Ubuntu 14.10 were most to note with the RadeonSI hardware while the Oibaf PPA + Linux 3.17 bring more remarkable improvements than the 14.04.1 to 14.10 transition.
Linux gamers using the RadeonSI Gallium3D driver should really consider upgrading their kernel and Oibaf PPA compared to what Ubuntu Linux offers in its default package archive.