https://bugs.freedesktop.org/show_bug.cgi?id=78453
--- Comment #11 from Luzipher luziphermcleod@yahoo.ie --- I bisected the Xorg startup "regression" and as suspected it is caused by commit: 315f3c171d423e13069beb99a6b772726a141865 radeonsi: use DRAW_PREAMBLE on CIK
Before that commit, "Xorg -retro" works without hangig the gpu, with that commit "Xorg -retro" hangs the gpu. Today I couldn't even get Xorg up at all, it went into a reset-loop with corruption in between right away.