(In reply to iive from comment #20)
> Anyway, bisect was done successfully.
> 
> I just still kind of don't understand why it landed on that commit.
> It doesn't look like this is the commit that changes the default amdgpu.dpm
> method.

The default change may have happened before that change and that change may
have broken the old dpm code since presumably dpm=1 was set while bisecting.