no audio output dummy only

[Huenils]

My output sound device "Lenovo Family 17h" worked well in Ubuntu 20.04.
device: IdeaPad-5-14ARE05
Since shortly it stopped working and only showed: "System => Sound => Output Device" - "Dummy Output".
Checked it with different kernels and it is not kernel related
problem since upgrade of libasound, so we set back to older version

cat /prod/asound/cards

 0 [Generic ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xd04c8000 irq 90
 1 [Generic_1 ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xd04c0000 irq 91
 2 [acp ]: acp - acp
                      LENOVO-81YM-IdeaPad514ARE05-LNVNB161216

we figured it to be no pulse problem but with alsa

solution:

sudo apt install libasound2=1.2.2-2.1 libasound2-data=1.2.2-2.1 libasound2:i386=1.2.2-2.1 libatopology2=1.2.2-2.1

to prevent from upgrades again:

echo libasound2 hold | sudo dpkg --set-selections

[Jaromir Obr (jaromir-obr)]

I've just found out that upgrade to the latest "groovy-proposed" fixed my issue (see the description in https://launchpad.net/ubuntu/+source/alsa-lib/1.2.3.2-1ubuntu3.1).
It seems that my issue reported in #1901901 is duplicate of #1901922 .