https://bugs.freedesktop.org/show_bug.cgi?id=93649
--- Comment #55 from Amarildo amarildo-geral@autistici.org --- Seems that hang handling wasn't implemented at all for some GPU's: https://cgit.freedesktop.org/~agd5f/linux/commit/drivers/gpu/drm/amd?h=amd-s...
I haven't yet tried playing TF2 with amd-staging-4.7 (though I have been using it for a few days). I'll try it this morning.