https://bugs.freedesktop.org/show_bug.cgi?id=84500
--- Comment #54 from Chernovsky Oleg adonai@xaker.ru ---
Great! You are the guy who also did the fan control patches aren't you?
Yep, that's me, thanks! I also stalkered Michel Dänzer for explanations of GTT and VMM at some time :)
As first step please try to catch an apitrace of it.
If that doesn't work and you still want to get your hands dirty with the code again contact me by mail (christian.koenig@amd.com) and we can discuss how to dig deeper into this issue.
Best regards, Christian.
Will do on weekend and mail you about results.