https://bugs.freedesktop.org/show_bug.cgi?id=66519
--- Comment #6 from Justin Piszcz jpiszcz@lucidpixels.com --- attach(In reply to comment #5)
Created attachment 81945 [details] [review] Debugging patch
Please try the attached patch, it shouldn't fix the issue but instead outputs some debug messages ("IH: CP....") into dmesg.
If you don't see those messages try to but the system under some graphics load, for example start glxgears ten times simultaneously or something like that.
Yes, that is what happened:
[ 334.326551] [drm:evergreen_irq_process] *ERROR* IH: CP EOP [ 334.326700] [drm:evergreen_irq_process] *ERROR* IH: CP EOP [ 334.326922] [drm:evergreen_irq_process] *ERROR* IH: CP EOP [ 334.327071] [drm:evergreen_irq_process] *ERROR* IH: CP EOP [ 334.327190] [drm:evergreen_irq_process] *ERROR* IH: CP EOP
Attaching full dmesg as well.