I am a new user on this forum. I bought around one year ago an AMD R9 280 graphics card. Since I installed Ubuntu 16.04, I've never been able to find an appropriate driver for my computer. My question is: are there any working drivers for Ubuntu 16.04 for my graphics card? I'm quite dissatisfied since the graphics card isn't old and still I haven't found any proprietary drivers working, and I found out on forums that they may not even exist. Can someone help me?