(In reply to taijian from comment #30)
> Created attachment 139739 [details] [review] [review]
> patch that seems to fix things for me
> 
> OK, going with Lukas' discovery, I have rebuild my kernel from
> drm-next-4.18-wip, applying the attached patch, reversing the atpx quirk
> discussed earlier, and also applying the debug patch (dmesg comes in the
> next post). 
> 
> And voilà: It seems to be fixed, AFAIK! YAY!

Just to be clear, it works fine without the ATPX quirk if you apply the HDA
fix?  Should I revert the ATPX quirk?