https://bugs.freedesktop.org/show_bug.cgi?id=91880
--- Comment #194 from Sandeep sandy.8925@gmail.com --- So, I had never used amdgpu.dc=1 and amdgpu.dpm=1 kernel parameters when testing earlier.
I tried using them now, with the 4.16.7 kernel, and replayed the APItrace file. No crashes! Finally.
Well, this is still a workaround, but atleast it works. I doubt it has anything to do with DC, although it's possible......