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What's happening?

My raspberry pi4 won’t sound HDMI.

(AV jack is working fine)

Raspi information

environment

OS - Raspberry Pi OS with desktop 2020-12(Flash with December 2nd 2020 image and run apt full-upgrade)

SD - 32GB

Monitor - BENQ

HDMI port - hdmi0

Monitors HDMI port - HDMI1

Raspi Volume - 100%

Monitor Volume - 10%

I did this

I had comment out

hdmi_drive=2

But monitor still no sound.

6
  • 2
    HDMI sound should work out of the box. Are you sure you're using the right port (the one close to the USB-C connector)? Commented Dec 7, 2020 at 9:08
  • 2
    There is NO "Official Raspbian"
    – Milliways
    Commented Dec 7, 2020 at 10:51
  • Oh I'm sorry. I mean 'Raspberry Pi OS'.
    – TamaTama
    Commented Dec 7, 2020 at 13:29
  • Yes. I am using HDMI0 port which close to the USB-C connector.
    – TamaTama
    Commented Dec 7, 2020 at 13:33
  • 1
    Have you tried running sudo raspi-config -> System options -> Audio and selecting the correct HDMI port for Audio output?
    – A6EE
    Commented Dec 7, 2020 at 13:47

2 Answers 2

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I had the same HDMI lack-of-sound problem, except that I was trying to connect the Pi to a Vizio TV. Used the HDMI0 port closest to the USB-C connector and uncommented hdmi_drive=2 in /boot/config.txt to no effect. Ran sudo raspi-config, checked Audio in System Options, and found the same "HDMI" and "Headphones" options as noted in the comments above, with "HDMI" apparently selected.

At that point, I tried something seemingly unintuitive based on past experience with badly written software. I selected "Headphones" and "OK" to change the stored setting from whatever it was to "Headphones". I then went back into Audio, selected "HDMI", and "OK to change the stored setting to "HDMI".

And with that, HDMI sound worked.

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Or, in the case of Raspberry Pi 3+ running Raspbian GNU/Linux 11 (bullseye), the options may be slightly different in Audio > System Options.

  • 0 Headphones
  • 1 MAI PCM i2-hifi-0
  • Select Option 1 and the end result should be the same - sound over HDMI.

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