this line looks relevent 18:57:44.0656 Gvc: DEBUG gvc_mixer_control_lookup_device_from_stream - Could not find a device for stream 'Built-in Audio Digital Stereo (HDMI)'
** Attachment added: "gnome-control-center -v > .log" https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1923525/+attachment/5487068/+files/gnome-control-center.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1923525 Title: gnome-control-center sound won't set hdmi 5.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1923525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs