Having the same exact issue in the same timeframe; a recent update to 20.04 removed the ability to select HDMI audio devices. As it is not related to a specific package such as alsamixer or pavucontrol, I believe it to be a kernel issue. Sorry for the lack of clarity; I will attempt to install again from the original April 2020 release, and then slowly perform updates, to see if I can determine which package or kernel update created the problem.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890285 Title: HDMI sound output cannot be selected anymore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1890285/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
