After version 1:3.36.5-0ubuntu3 is installed, reboot the machine, open the gnome-control-center sound, the speaker is the active output device, change the volume, the output volume could be changed with UI change, plug a HDMI monitor, select HDMI audio from UI, adjust the volume from volume-slider, the output volume could be changed with the volume-slider change.
Verification for focal:
adding below 2 lines in the /etc/apt/ sources. list: cn.archive. ubuntu. com/ubuntu/ focal-proposed main restricted multiverse universe cn.archive. ubuntu. com/ubuntu/ focal-proposed main restricted multiverse universe
deb http://
deb-src http://
sudo apt-get update center
sudo apt install gnome-control-
After version 1:3.36.5-0ubuntu3 is installed, reboot the machine, open the gnome-control- center sound, the speaker is the active output device, change the volume, the output volume could be changed with UI change, plug a HDMI monitor, select HDMI audio from UI, adjust the volume from volume-slider, the output volume could be changed with the volume-slider change.
Verification done on focal.
thx.