>>56Radeon HD7950 GPU
Your GPU won't ever be supported by AMD, at least not in the short to medium term. Vulkan will only be available with the new AMDGPU kernel driver, and that means Sea Islands/Volcanic Islands chipsets and later. Your only hope there is for Vulkan to eventually show up in Mesa and get backported for use with Radeon/Radeonsi drivers.
Thing is, AMD hasn't even released proprietary Linux drivers with Vulkan support yet. I was thinking about heading down and grabbing an nVidia GPU for my home system, but decided against it at the last minute. AMD better get their shit together.
Also, the 4.5 Linux kernel sure is taking a fucking long time to get out of RC purgatory. What gives?