Hi, Clément, Marek recently posted patches [1] which are supposed to fix a hang with hyperz. Could you test them? Also there are some other patches which fix rendering with hyperz enabled [2]. As far as I understand these two series were reviewed by not yet mainlined. [1] http://lists.freedesktop.org/archives/mesa-dev/2014-August/066519.html [2] http://lists.freedesktop.org/archives/mesa-dev/2014-August/066389.html