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No sound on HDMI Ubuntu 20.04 - Ask Ubuntu
https://askubuntu.com/questions/1256043/no-sound-on-hdmi-ubuntu-20-04
I see at least three possible reasons: your sound devices may be muted by default - run alsamixer and make sure all sound devices are unmuted. I assume you've... You may have to set a default 'sink' for sound output. Here is one post that helped me in the past with Xfce. One thing... Linux kernel ...
Fix No Sound Through HDMI In External Monitor In Ubuntu ...
https://itsfoss.com/how-to-fix-no-sound-through-hdmi-in-external-monitor-in-ubuntu/
I saw a number of forum posts with trouble on the audio problem in extended monitor in Ubuntu. Thankfully this problem was not complex, at least in this case with Ubuntu 12.04. The reason in my case was that the default sound setting was “built-in speaker audio”. Changing it to HDMI saved my day. Step 1. Open the sound setting. Type “sound” in Unity dash …
Fixed: No Sound in Ubuntu as HDMI Enabled By Default
https://itsfoss.com/fix-sound-ubuntu-1404/
Fixing no sound in Ubuntu when HDMI is set as default. Now to force Ubuntu to use analog output instead of HDMI by default, we need a little information. Open a terminal and use the following command: aplay -l. This will list the devices, card number etc. Note down the card and device number for analog output.
18.04 - Ubuntu 19.04 and HDMI sound problem - Ask …
https://askubuntu.com/questions/1149599/ubuntu-19-04-and-hdmi-sound-problem
when viewing the sound devices, only built-in sound device are found/listed, no HDMI sound device found/listed. then I found it is not only live CD's problem, because I did a fresh installation as well, and the symptom is the same. Note that previous iterations of Ubuntu MATE worked well, and if I switch back to 18.04, then everything is fine ...
Sound problems with HDMI connection - Ask Ubuntu
https://askubuntu.com/questions/46582/sound-problems-with-hdmi-connection
Try looking in sound preferences (click the volume applet and select Sound Settings). From there, look in the output tab and make sure HDMI is selected. If that doesn't work, try looking in the hardware tab, which should contain a dropdown, where you should see HDMI. Select that and it …
Can someone please help me why I can't get my sound ...
https://askubuntu.com/questions/1391980/can-someone-please-help-me-why-i-cant-get-my-sound-working-on-my-ubuntu-21-10-6
The only other real difference is the Ubuntu System is in an ARGON M2 case that uses an add in board to give me full size Hdmi connectors and the other Manjaro System is a case that doesn't. The Manjaro system has just worked no problem sound and all but the person I am trying to get this to work for wants Ubuntu.
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