I'm using amd-staging-drm-next c55469bdd90b83bd31b40dd1eca5e50678731ac1 on

43:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Vega 10 XT [Radeon RX Vega 64] [1002:687f] (rev c1)

I have an AMD X399 motherboard. If I attempt suspend, machine will hang.
However, if I boot with 'nomodeset', both suspend and resume work (the keyboard
is working and I can SSH into the machine; the display doesn't come up, but
that's a separate issue).