I have the same bug. I used to work around this by installing an alternative sound device selector shell extension but this one broke down when Gnome shell upgraded to 3.31.91. So now there is no way for me to switch to HDMI output any more.
The select box shows the correct devices but selecting a different one has no effect. It is also not saved and when reopening control center the default device is once again selected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817338 Title: HDMI sound output not selectable in 19.04 (but works in 18.10) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1817338/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
