So, I hate to use proprietary drivers. Every one I ever tried was CRAP from AMD, starting with a mobile HD 4250 from a few years ago. It was crap. Well, now I own a new gaming desktop with an R9 270X. Well, it's even worse. No driver works. No beta works. No FOSS worked at first either. That sucks. But I installed the edgers PPA and the FOSS drivers work 1000x better, albeit random crashes and such. But even trying the new AMD 14.1 beta, THEY STILL SUCK AND ARE BROKEN. I'm on a Linux Mint 16 MATE PC, FX-8350, R9270X, 16GB RAM, etc etc. But this thing is about as useful as a pentium 4 right now. I fail to open ANYTHING OpenGL with any driver set from AMD, it completely breaks everything thats not 2D. FOSS drivers can play TF2 perfect at 250fps, but Rust crashes bad every 30 minutes or so. No AMD drivers even make it that far. What a load of crap, why not at least help the FOSS MESA drivers and fix the _VERY_ few issues they have, and add more OpenGL support than make these PISS POOR drivers that DO NOT WORK.
I hate spending $250 on a GPU that SUCKS. I may even sell this one and get an NVIDIA card. For NVIDIA's steam boxes, they got perfect FOSS drivers for it. You should be ashamed the GPU I'm using is used in a steam box. It will be broken, for sure.
Thanks for listening. Now get someone from AMD who knows what they're doing working on MESA to fix this garbage GPU support. Fix it, or you lost a customer who has built an ALL-AMD PC, and recommends parts to many friends, and also will be building a new PC in a couple years!