R600 Open-Source Driver WIth GLSL, OpenGL 2.0
Phoronix: R600 Open-Source Driver WIth GLSL, OpenGL 2.0
If Catalyst 9.12 for Linux and its changes didn't deliver on what you wanted for your Christmas wishes, perhaps this change to their open-source driver does deliver on one of your hopes. The ATI R600/700 open-source 3D stack should now be OpenGL 2.0 compatible (compared to OpenGL 1.5 previously) and the GLSL (GL Shading Language) support should be "mostly" completed. AMD's Richard Li recently introduced a commit that enables GL2 and there has been other AMD/ATI 3D work going on too...