https://bugs.freedesktop.org/show_bug.cgi?id=93648
--- Comment #1 from Pierre Bourdon delroth@gmail.com --- Someone on IRC just reported something that sounds like the same issue, but on r600.
It's likely that this issue comes from geometry shaders, which we are using to generate stripes from lines. Disabling the use of geometry shaders breaks some features in Dolphin but fixes that particular problem.