https://bugs.freedesktop.org/show_bug.cgi?id=99710
--- Comment #17 from Sandeep sandy.8925@gmail.com --- Definitely seems to be DPM related, I used the following command to force DPM performance level, and Left 4 Dead 2 and OpenArena worked fine with no hangs.
"echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level"
Works fine if I set "low" as well.
The system hangs if I set "auto".
Well, atleast I have a trace that reproduces it.