I just studied the PulseAudio 13 release notes and it is probably related to the following "improvement" ...
::Automatically switch away from unavailable card profiles:: How about restoring the profile when it becomes available again? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1905080 Title: After upgrading from Ubuntu 18 to 20 pulseaudio starts with HDMI output disabled and doesn't turn on when I turn on the TV Status in pulseaudio package in Ubuntu: New Bug description: Before the upgrade the HDMI 4 digital stereo output was chosen automatically for my nvidia GF card and was usable by the players immediately after turning the TV on. After the upgrade I have to switch the profile from Disabled to HDMI4 each time I turn the TV on. It doesn't get stored properly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1905080/+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
