Original fix suggestion came from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860697/comments/6
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1866890 Title: audio card not detected after upgrade to 20.04 (Only Dummy Output appears) Status in alsa-driver package in Ubuntu: New Bug description: 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). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1866890/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
