You could test the amdgpu-pro dkms from amd.com with 4.4 or 4.8 kernel (doesn't work with anything newer). Install just the dkms, nothing else.
You could test the amdgpu-pro dkms from amd.com with 4.4 or 4.8 kernel (doesn't work with anything newer). Install just the dkms, nothing else.