https://bugs.freedesktop.org/show_bug.cgi?id=60879
--- Comment #170 from David Verelst david.verelst@gmail.com --- Created attachment 134576 --> https://bugs.freedesktop.org/attachment.cgi?id=134576&action=edit journalctl -k amdgpu with linux-amd-staging-git
Also no luck with AMDGPU. Here's the kernel output for booting with linux-amd-staging-git 4.12.0-2a69a4b35621, (on Arch Linux, see also https://aur.archlinux.org/packages.php?ID=442065).