audio card not detected after upgrade to 20.04 (Only Dummy Output appears)

[Eduardo Aguilar Pelaez]

Since upgrading to 20.04 the sound card is no longer detected.

This means that I can only see "Dummy Output" in the sound settings.

The audio works if I use Bluetooth headphones but not if I try to use the speakers or the 3.5mm headphone jack.

My machine is a Lenovo ThinkPad X1 Yoga (4th gen).

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1866890/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Eduardo Aguilar Pelaez (edu-ap)]

Seems similar to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860697

[Eduardo Aguilar Pelaez (edu-ap)]

I added `options snd-hda-intel dmic_detect=0`
at the end of /etc/modprobe.d/alsa-base.conf
and after restarting the laptop I can now use the headphones and speakers.

Although I managed to fix this,
- could this be resolved for other users?

Many thanks!

Eduardo

[Eduardo Aguilar Pelaez (edu-ap)]

Original fix suggestion came from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860697/comments/6

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.