$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Fix No Sound on Ubuntu 20.04 – Complete Audio Troubleshooting Guide

May 20, 2025 | By the+gnu+linux+evangelist.

Troubleshooting

  1. 2. Check Volume and Mute Settings

    Ensure that all system and application volumes are turned up and not muted. Also check physical mute buttons or function keys like:

    Fn + F1
  2. 3. Check External Audio Connections

    Verify that your headphones or speakers are correctly plugged in. Test different audio ports and confirm if the issue affects only speakers or headphones.

  3. 4. Select Correct Audio Output Device

    Launch the Sound Settings on Ubuntu:

    gnome-control-center sound

    In the Output tab, select your active sound device and click Test to verify audio output.

  4. 5. Check ALSA Mixer Configuration

    Run alsamixer to check and adjust audio levels:

    alsamixer

    Use arrow keys to change volume, press:

    M

    to unmute. Look for “OO” (unmuted) and “MM” (muted). Exit with:

    Esc
  5. 6. Reload PulseAudio and ALSA

    Resetting Ubuntu audio services can resolve common sound issues:

    sudo alsa force-reload
    pulseaudio -k
    pulseaudio --start
  6. 7. Reinstall PulseAudio and ALSA

    If audio is broken, reinstall PulseAudio and ALSA on Ubuntu:

    sudo apt remove --purge alsa-base pulseaudio
    sudo apt install alsa-base pulseaudio
    sudo alsa force-reload

    Then reboot your system.

  7. 8. Fix Dummy Output in Ubuntu

    If you see only Dummy Output in Sound Settings, run:

    aplay -l

    If no audio devices appear, reload the driver:

    sudo modprobe snd-hda-intel
    sudo alsa force-reload
  8. 9. Test Sound on Ubuntu Live USB

    Boot with a Ubuntu Live USB and test the audio. If it works, the issue is likely software-related in your installed environment.

Contents


Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,