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Install Realtek Audio drivers in Ubuntu 20.04 (Intel Nuc ...
https://askubuntu.com/questions/1258583/install-realtek-audio-drivers-in-ubuntu-20-04-intel-nuc-nuc10i7fnh
The HDMI/Display Port - Built-in Audio output device will then appear in the audio settings. You'll need to do it every time you reboot. It's not perfect, but it's a work-around until we work out why it doesn't appear automatically on reboot. Please let me know if you see similar behaviour with your NUC.
No sound on HDMI Ubuntu 20.04 - Ask Ubuntu
https://askubuntu.com/questions/1256043/no-sound-on-hdmi-ubuntu-20-04
HDMI sound not working after upgrading to 20.04. Ubuntu 18.04: Audio doesn't work unless I switch between outputs. does not detect my sound card HDMI. Also I've downloaded Ubuntu 20.04 iso again and reinstalled the system, but it doesn't work. HDMI worked perfectly when I used Windows 10 before replacing it with Ubuntu. When I run aplay -l I ...
sound - How to get HDMI audio working on ... - Ask Ubuntu
https://askubuntu.com/questions/1320536/how-to-get-hdmi-audio-working-on-intel-nuc8i5beh
There is a similar NUC at the day job (an 8i7HNK) that had audio issues over HDMI. The solution was to disable tsched in PulseAudio's default.pa file. From the documentation. tsched Since 0.9.11.Use system-timer based model (aka glitch-free).
Ubuntu – No sound on Ubuntu 16.04 with realtek ALC892 ...
https://itectec.com/ubuntu/ubuntu-no-sound-on-ubuntu-16-04-with-realtek-alc892/
Open it Pulse Audio Volume Control and in Configuration tab you can see the ATI HDMI Digital Setereo and Internal Audio. Select to Internal Audio: Stereo Analog Duplex (Estéreo analógico duplex). In Pulse Audio Volume, select Ouput devices , …
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.
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