No audio output in 18.04. Only output device is 'dummy output'

Question

[edit: Wasn't able to solve this, using a different distro now. Don't bother commenting on the question. Thank you guys for all your help.]

I have installed Ubuntu 18.04 on an HP Chromebook 15. (Not through Crouton or anything, really installed Ubuntu.) No audio is output through my internal speakers, nor external, nor headphones. The only output device in my list is 'dummy Output'. Any help would be much appreciated. Please tell me if you need any hardware info, I'd be happy to provide it. While I am aware that this question has been asked before, none of the answers I found helped.

Here are a couple links to solutions I've already tried:

Fix no sound dummy output issue

Sound card shown as dummy output in ubuntu 18 04

Ubuntu 18.04 dummy output and sound disappeared

Persistent dummy output

Dummy output instead of audio device on debian 9

Restarting ALSA didn't help, and attached is a picture of what happens when I run 'alsamixer' in the terminal. Image

The output of pacmd list-cards is as follows:

    index: 0
    name: <alsa_card.pci-0000_00_1f.3>
    driver: <module-alsa-card.c>
    owner module: 7
    properties:
        alsa.card = "0"
        alsa.card_name = "HDA Intel PCH"
        alsa.long_card_name = "HDA Intel PCH at 0xd112c000 irq 126"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1f.3"
        sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "9d71"
        device.product.name = "Sunrise Point-LP HD Audio"
        device.form_factor = "internal"
        device.string = "0"
        device.description = "Built-in Audio"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    profiles:
        output:hdmi-stereo: Digital Stereo (HDMI) Output (priority 5400, available: no)
        output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (priority 300, available: no)
        output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (priority 300, available: no)
        output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (priority 5200, available: no)
        output:hdmi-surround-extra1: Digital Surround 5.1 (HDMI 2) Output (priority 100, available: no)
        output:hdmi-surround71-extra1: Digital Surround 7.1 (HDMI 2) Output (priority 100, available: no)
        output:hdmi-stereo-extra2: Digital Stereo (HDMI 3) Output (priority 5200, available: no)
        output:hdmi-surround-extra2: Digital Surround 5.1 (HDMI 3) Output (priority 100, available: no)
        output:hdmi-surround71-extra2: Digital Surround 7.1 (HDMI 3) Output (priority 100, available: no)
        output:hdmi-stereo-extra3: Digital Stereo (HDMI 4) Output (priority 5200, available: no)
        output:hdmi-surround-extra3: Digital Surround 5.1 (HDMI 4) Output (priority 100, available: no)
        output:hdmi-surround71-extra3: Digital Surround 7.1 (HDMI 4) Output (priority 100, available: no)
        output:hdmi-stereo-extra4: Digital Stereo (HDMI 5) Output (priority 5200, available: no)
        output:hdmi-surround-extra4: Digital Surround 5.1 (HDMI 5) Output (priority 100, available: no)
        output:hdmi-surround71-extra4: Digital Surround 7.1 (HDMI 5) Output (priority 100, available: no)
        off: Off (priority 0, available: unknown)
    active profile: <off>
    ports:
        hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-3: HDMI / DisplayPort 4 (priority 5600, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-4: HDMI / DisplayPort 5 (priority 5500, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"

Is this a lost cause? Should I just reinstall ChromeOS?

Welcome to Askubuntu. It helps to provide links to the answers you've already tried so we don't go suggesting things you've already done. Thanks. — mchid, Sep 08 '20 at 08:44
@mchid Got it. Give me a moment to go through some links and add to the post. — Hidden_R3d, Sep 08 '20 at 08:57
No problem. Another thing, did you install pavucontrol which shows up as "pulseaudio volume control" in your installed applications? This is usually step one as you may need this later. Additionally, I noticed only HDMI shows up. Sometimes, you can plug an HDMI cable in and unplug it to refresh the devices. — mchid, Sep 08 '20 at 08:58
@mchid Yes, I have installed pavucontrol. I'll do what you suggested momentarily. Should I make sure that the HDMI cable is connected to some other output, or does that not matter? — Hidden_R3d, Sep 08 '20 at 09:02
I don't think it needs to be connected on the other end but if that doesn't work, it wouldn't hurt to try. — mchid, Sep 08 '20 at 09:04
I (somehow) just noticed that my device doesn't have an HDMI output (even though I swore it did). Sorry about that. Any other suggestions? — Hidden_R3d, Sep 08 '20 at 09:07
It looks like you may be missing an asound.state file or there may be a custom version of this file that could make your audio work. — mchid, Sep 08 '20 at 09:39
I tried generating that file with alsactl store, which created the file, but changed nothing. — Hidden_R3d, Sep 08 '20 at 09:45
I found an answer that talks about the file. However, I suggest backing up your original existing /var/lib/alsa/asound.state file before you try the fix just in case. There is an answer that deals with this here. They say you can get the file from a copy of galliumOS or you can probably copy the /var/lib/alsa/asound.state file from ChromeOS if you still have access to it. — mchid, Sep 08 '20 at 09:47
The one you generated probably isn't correct but the one from GalliumOS or from ChromeOS supposedly has the correct configuration. — mchid, Sep 08 '20 at 09:50
Alternatively, the linked GalliumOS file referenced in the answer may work for you as this is the one for GalliumOS which should theoretically be the same for all Chromebooks. — mchid, Sep 08 '20 at 09:55
Again, I would make a backup before replacing any file. There is also a GalliumOS /etc/pulse/default.pa file here on github that some people have had success with. Additionally, a misconfigured default.pa is often responsible for "dummy output" problems. Reboot after replacing the file. — mchid, Sep 08 '20 at 13:06
Just FYI: The sound output over Display Port is also called HDMI. — Dubu, Sep 08 '20 at 18:25
Check out https://askubuntu.com/a/1469281/124466. Sound works on native installations of Ubuntu beyond version 22.10. — Archisman Panigrahi, May 24 '23 at 20:10

score 0 · Answer 1 · answered Aug 03 '22 at 08:09

Try running modprobe --show-depends snd_hda_intel, if it says

modprobe: FATAL: Module snd_hda_intel not found in directory /lib/modules...

then you're missing the linux-modules-extra package containing these. I think it was introduced somewhere between kernel 4 and 5. If so, then this might help

sudo apt install linux-modules-extra-$(uname -r)

No audio output in 18.04. Only output device is 'dummy output'

1 Answers1