Comment # 35 on bug 1177428 from Karl Mistelberger

(In reply to Takashi Iwai from comment #34)
> Hmm.  The latest TW kernel-firmware package contains 20.40, so this should
> have triggered the same problem.
> 
> Could you confirm the following?
> - Remove /lib/firmware/updates/*
> - Install again the latest TW kernel-firmware (20201008)
> - mkinitrd and reboot

Boot fails.

> If this shows the boot problem, try to put picasso 20.40 firmware again
> /lib/firmware/updates, mkinitrd and retest.

Boot works. :-)