[Bug 90481] Radeonsi driver, X crash while playing "Spec ops: the line"

https://bugs.freedesktop.org/show_bug.cgi?id=90481

--- Comment #14 from at46n@t-online.de --- I'm also affected by this bug with my r7 260x on Ubuntu 16.04. If I'm able to switch to a tty my system give my an endless amount of messages with "radeon 000:01:00.0: ring 0 stalled for more than 10004msec". Last time I also got "[drm:ci_dpm_enable [radeon]] *ERROR* ci_start_dpm failed [drm:radeon_pm_resume [radeon]] *ERROR* radeon: dpm resume failed [drm:radeon_pm_resume [radeon]] *ERROR* radeon: dpm resume failed"