On Sun, Apr 15, 2018 at 11:48:53AM +0300, Denis wrote: > For test I've just updated OpenBSD from 6.2amd64 to 6.3amd64 on Intel > based machine (shortened dmesg is listed below) and there is no 'athn0: > could not load firmware' error appears after upgrade. On Intel's > platform AR9271 works as expected. > > On AMD based machine 'athn0: could not load firmware' error is > permanent. AR9271 does not work completely on AMD GX-420CA SOC. Full > dmesg of AMD machine fully listed in my previous message.
Thank you for reporting back. This confirms that you're seeing an already known problem. We need someone with a solid understanding of the USB spec and EHCI and/or XHCI to look into this. I don't have time for it.