Comment 45 for bug 1921632

I got it working

Ubuntu 21.04 hirsute default version 1.2.4-2ubuntu1 of package alsa-ucm-conf does not work.
the latest 1.2.5 version "git clone https://github.com/alsa-project/alsa-ucm-conf.git"
There is a new syntax introduced in upstream alsa-ucm-conf.

Exactly with this version of alsa-ucm-conf works only
https://github.com/alsa-project/alsa-ucm-conf/archive/548036b8ecc92d4e8e2070046551fb0b8acb7d96.zip
just before new syntax is introduced.

It works for me even without a new topology file
https://github.com/thesofproject/linux/files/5912926/sof-tgl-rt711-rt1308-2ch.tplg.gz in
/lib/firmware/intel/sof-tplg/

which is strange (because previously it made a difference)

See
https://github.com/thesofproject/linux/issues/2700#issuecomment-854033711