(In reply to comment #17)
> (In reply to comment #16)
> > Created attachment 101179 [details] [review] [review] [review]
> > possible fix
> > 
> > Maybe there is some problem with the clocks or voltage in the highest power
> > level.  Does the attached patch help?
> 
> Where and how do I apply this patch to... wherever it's supposed to go? And
> will it work on a Richland APU?

It applies to the kernel.  You need to apply the patch and build and install
the kernel.