https://bugs.freedesktop.org/show_bug.cgi?id=28154
--- Comment #5 from Marek Olšák maraeo@gmail.com 2010-06-07 07:45:17 PDT --- Oh crap.. well... r32g32_sscaled still is not supported by the driver but somehow it passes ~0 as a vertex format through to hw, which in turn locks up the machine. You got lucky, the kernel managed to reset your GPU. What kernel version do you use?