https://bugs.freedesktop.org/show_bug.cgi?id=69723
--- Comment #65 from Alexandre Demers alexandre.f.demers@gmail.com --- (In reply to comment #63)
Created attachment 90542 [details] [review] possible fix
Thanks for tracking this down. The attached patch should fix the issue. With this fixed, it may be worth checking to see if you can reliably use the tweaked clocks on certain oem boards (basically disable the ni code added to fix bug 69723).
I reverted patches from bug 68235 as suggested, applied the proposed patch to disable mclk spread spectrum and I'm now running this new kernel. First observation: without patches from bug 68235 prior to disabling mclk ss, I was unable to load a session without it hanging in less thant a minute. It's now rock solid running GPU clock at 830MHz and memory clock at 1300MHz. I'll run a couple of other tests, but I think we got it!