https://bugs.freedesktop.org/show_bug.cgi?id=93988
jk jahnkohl@web.de changed:
What |Removed |Added ---------------------------------------------------------------------------- Resolution|NOTOURBUG |NOTABUG
--- Comment #3 from jk jahnkohl@web.de --- Ok notabug would be better.. the problem was in mkinitcpio.conf, the radeon module was loaded there and conflicted with the amdgpu module... After i removed this entry everything worked.