https://bugs.freedesktop.org/show_bug.cgi?id=97460
--- Comment #2 from Alex Deucher alexdeucher@gmail.com --- Created attachment 126010 --> https://bugs.freedesktop.org/attachment.cgi?id=126010&action=edit workaround
This patch should work around the crash. No idea why the bios is broken in amdgpu and fine on radeon in the switchable gfx case.