https://bugs.freedesktop.org/show_bug.cgi?id=84500
--- Comment #38 from Alexandre Demers alexandre.f.demers@gmail.com --- For the last couple of days, I've been playing with kernel 3.19 drm-next and with some previously problematic 3.18 kernel versions. I was unable to reproduce the problem.
Mesa was updated a couple of time since the beginning of the bisection, as for the ddx drive. I'll keep this bug open for still a couple of days, but I may end up closing it if I don't encounter the bug anymore.