https://bugs.freedesktop.org/show_bug.cgi?id=55692
--- Comment #23 from Christian König deathsimple@vodafone.de --- Created attachment 68623 --> https://bugs.freedesktop.org/attachment.cgi?id=68623&action=edit 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.