No sound over HDMI

I installed lubuntu-22.10 on a new machine and I can’t get the sound over the HDMI.
Should a driver for that device be listed?

$ inxi -SMA
System:
  Host: me-aspiretc281 Kernel: 5.19.0-23-generic arch: x86_64 bits: 64 Console: pty pts/0
    Distro: Ubuntu 22.10 (Kinetic Kudu)
Machine:
  Type: Desktop Mobo: Acer model: Aspire TC-281 serial: <superuser required>
    UEFI: American Megatrends v: R01-A2 date: 07/18/2017
Audio:
  Device-1: AMD Kabini HDMI/DP Audio driver: N/A
  Device-2: AMD Family 15h Audio driver: snd_hda_intel
  Sond Server-1: ALSA v: k5.19.0-23-generic running: yes
  Sound Server-2: PulseAudio v: 16.1 running: yes

Do you know if this happens with any other HDMI cables you have lying around?

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Is this audio device working when connected to something else?

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Works fine in lubuntu-22.04.1

$ inxi -SMA
System:
  Host: lubuntu Kernel: 5.15.0-43-generic x86_64 bits: 64
    Desktop: LXQt 0.17.1 Distro: Ubuntu 22.04.1 LTS (Jammy Jellyfish)
Machine:
  Type: Desktop Mobo: Acer model: Aspire TC-281
    serial: <superuser required> UEFI: American Megatrends v: R01-A2
    date: 07/18/2017
Audio:
  Device-1: AMD Kabini HDMI/DP Audio driver: snd_hda_intel
  Device-2: AMD Family 15h Audio driver: snd_hda_intel
  Sound Server-1: ALSA v: k5.15.0-43-generic running: yes
  Sound Server-2: PulseAudio v: 15.99.1 running: yes
  Sound Server-3: PipeWire v: 0.3.48 running: yes
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Vanilla kernel-6.1rc3 has the HDMI output. :slight_smile:

What kernel will 22.10 get to?

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Question has also been asked at [lubuntu] no sound over HDMI

Ubuntu 22.10 will have security fixes backported to its 5.19 kernel, just as per prior non-LTS releases.

There is no HWE option with non-LTS releases.

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This sounds an awful lot like a kernel regression. Maybe you could file a bug on it? Run ubuntu-bug linux in a terminal and follow the on-screen instructions. If you don’t have one already, you will be asked to create an Ubuntu One account. More info on reporting kernel bugs is here: Kernel/Bugs - Ubuntu Wiki

Provide as much info as possible, especially the fact that this used to work in Lubuntu 22.04.1 and also works if you install the mainline kernel. Those are two very important snippets of info to have. Also include what you did, what you expected to happen, and what happened instead - sometimes something may seem painfully obvious to you, but describing it in detail will help the bug fixer on the other end of the bug report able to figure things out better. Sometimes small details are important. As for hardware info, the ubuntu-bug command will attach your hardware info to the bug report, so much of the important stuff will be in there. It may still be helpful to tell them what computer you have though (something like “HP Pavilion 14-ce3064st”, for example).

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What package should the bug report go under?

The linux package. Running ubuntu-bug linux will automatically file it under the right package. Even if this turns out to be the wrong package (which I doubt), that’s fine, the Ubuntu developers and volunteers can change the package if it’s discovered that the bug is somewhere else.

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