(In reply to Marek Olšák from comment #142)
[..]

> In my case, this is the data I've been able to obtain:
> - Reproduced on everything I was testing on: Hawaii (radeon), Tonga,
> Polaris11 (amdgpu)
Out of curiosity: what about r600?

> Action items:
> - Reproduce the hang and do a hardware scan dump (it can only be done in the
> AMD office AFAIK), and send it to hardware teams.
Any news here?

My best bet still is either something in DPM or LLVM.
DPM path is supported by this card being one of those needing a DPM quirk in
si_dpm.c.