https://bugs.freedesktop.org/show_bug.cgi?id=35312
--- Comment #6 from Francis Whittle FJ.Whittle@gmail.com 2011-05-11 02:00:42 PDT --- Still doesn't work on RS880 until it's added to the conditional on line 813 of r600_hw_context.c
I wonder if this should apply to rv620, rv635 (and rs780?) also?