https://bugs.freedesktop.org/show_bug.cgi?id=93649
--- Comment #15 from Nicolai Hähnle nhaehnle@gmail.com --- This is certainly a bug in our driver (unlike what was written on the Github tracker, a game *can* cause a hang e.g. by writing an infinite loop in a shader, but that seems exceedingly unlikely in the case of TF2). The problem with this particular bug is that it seems non-deterministic (i.e. not reliably reproducible), and that makes it hard to debug.