https://bugs.freedesktop.org/show_bug.cgi?id=108307
--- Comment #1 from Alex Deucher alexdeucher@gmail.com --- Can you bisect? If you set modprobe.blacklist=amdgpu on the kernel command line in grub and you are still getting a problem, it's an issue outside of the graphics driver. If so, does setting pci=noacpi help?