Comment # 4 on bug 1023385 from Stefan Dirsch

Thanks. I've prepared a fix meanwhile.

xf86-video-amdgpu.changes:
-------------------------------------------------------------------
Fri Feb  3 11:05:07 UTC 2017 - sndirsch@suse.com

- make the driver default for Tumbleweed (upcoming Leap 42.3,
  sle13, ...), if "amdgpu" is the kernel driver of the device;
  still use device list specified in amdgpu.ids for older
  distributions like Leap 42.2, sle12, ...

xorg-x11-server.changes
-------------------------------------------------------------------
Fri Feb  3 11:40:11 UTC 2017 - sndirsch@suse.com

- N_driver-autoconfig.diff:
  No longer try to load "amdgpu" DDX by default for all GPUs with
  ATI vendor ID; this is now handled instead by an "OutputClass" 
  section via kernel driver match, which has been added as config
  file to xf86-video-amdgpu driver package (bnc#1023385)

You can even verify the fix on TW yourself.

zypper ar
http://download.opensuse.org/repositories/X11:/XOrg/openSUSE_Tumbleweed/
X11:XOrg
zypper ref
zypper up -r X11:XOrg xorg-x11-server xf86-video-amdgpu