(In reply to Ben Klein from comment #25)
> Created attachment 145918 [details]
> Journal excerpt vega56 ring gfx timeout, then gpu reset
> 
> I think I'm having this problem on a Vega 56, I didn't see anyone else
> mention that card here.
> 
> I attached the relevant log, I think it's this same issue, but someone
> correct me if I'm wrong.
> 
> OpenGL renderer string: Radeon RX Vega (VEGA10, DRM 3.33.0,
> 5.3.0-20-generic, LLVM 9.0.0)
> OpenGL core profile version string: 4.5 (Core Profile) Mesa 19.2.1
> 
> Running Pop!_OS:
> Linux robo-triangulum 5.3.0-20-generic
> #21+system76~1572304854~19.10~8caa3e6-Ubuntu SMP Tue Oct 29 00:4 x86_64
> x86_64 x86_64 GNU/Linux

Could be, there are a few patches in latest RADV, so try out MESA 20.0 git to
see if it fixes anything for you... apparently radv hangs for navi gpus stopped
with that fix.