Comment # 11 on bug 952781 from Stefan Dirsch

Max, since Felix has a XGI graphics card card (Volari Z7/Z9), he really needs
the xgi instead of the sis driver. I was able to build the xf86-video-xgi
driver
from git master on openSUSE Leap 42.2, so chances aren, that it even loads with
the current Xserver. 

I wouldn't recommend using any native kernel framebuffer. They are ancient and
poorly tested - if tested at all since years.

I doubt that Felix's machine has already UEFI so UMS driver should still work.
Dislaymanagers still starting Xserver as root are also still available.