Comment # 3 on bug 110360 from jian-hong@endlessm.com

Created attachment 143916 [details]
The dmesg of disabled amdgpu's runpm

(In reply to Alex Deucher from comment #2)
> Does booting with amdgpu.runpm=0 on the kernel command line in grub help?

System boots correctly with amdgpu.runpm=0 on the kernel command line.