(In reply to comment #23)
> Created attachment 68623 [details] [review] [review]
> Test patch.
> 
> VM is definitely enabled, otherwise you won't got that error in the first
> place.
> 
> Ok let's try to narrow down that bug a bit more, please apply the attached
> test patch and see what happens.
> 
> If the GPU hang vanished we indeed have a syncing issue, but not the PFP
> sync.

The patch resets the gpu constantly, even without X, with both linus git and
agd5f drm-next-3.7 branch with mesa git.