Use image from @balbes150 from this topic RC2 of 5.5 mainline kernel works best (haven't tried rc6 yet, but with rc5, USB3 stopped working.   When you burn the image to your SD-card patch it up following this procedure:   System works pretty well, except for Wi-fi and bluetooth. The system is not fully optimized and it has issues playing video clips, especially at higher resolution. I hope GPU support will also get polished if that's the issue.