On Tue, Mar 21, 2017 at 04:01:53PM +0000, Deucher, Alexander wrote: > It seems to only affect Stoney systems, but not others (Carrizo, > Bristol, etc.). Maybe we could just disable it on Stoney until we > root cause it. Completion-wait loop timeouts indicate something is seriously wrong. How can I detect whether I am running on a 'Stoney' system? Other question, a shot into the dark, does the GPU on these systems have ATS? Probably yes, as they are likely HSA compatible. Joerg