Comment # 18 on bug 1174703 from Takashi Iwai

(In reply to Peter S�tterlin from comment #17)
> One more info:
> I just wanted to DUP the system, which showed that it would install kernel
> 5.8.
> 
> Therefore, I first rebooted the current system (TW 20200804) with the
> previous kernel (5.7.9-1-default).
> 
> With that, one both audio devices do connect and work without issues.
> 
> So the kernel definitely seems to have its share...

Hm, can you reproduce the working and the non-working cases reliably by
switching the different kernel?  If so, it's certainly a good hint.