Comment # 87 on bug 81644 from Michel Dänzer

(In reply to comment #86)
> https://bugs.freedesktop.org/show_bug.cgi?id=83500

I think in the meantime Grigori has seen GPU hangs even with that patch though,
with 2D tiling.

However, can you avoid the problem if you start Chromium with the environment
variable R600_DEBUG=nodma?