I connected my PC to my TV via HDMI and had to set the default video and audio outputs to the TV, everything worked fine, but after I disconnected, the video playback speed was at 0.5x and the audio was not working. I don't really remeber how I fixed the video playback speed, just that it was pretty simple, but the audio never worked again.

I've tried the answers provided in these questions:

But none was able to get my audio back working.

Audio via bluetooth devices works fine. Please help, I'm new to Ubuntu, and Linux in general, and this is starting to get really annoying.


Similar instance of problem here on a v18.04 box; alsa output works, but pulse is just Dummy Ouput.

This seems to bring back pulseaudio without rebooting. First close any programs using pulseaudio, then as a regular user run:

pulseaudio --kill; sleep 2s; sudo alsa force-reload ; pulseaudio --start

Then play a sound file.

  • 1
    thanks, but it didn't work – Filipe Jode Feb 11 '19 at 17:35
  • 1
    It helped me ubuntu 18.04 – lovalim Feb 15 '19 at 5:10
  • Also helped on Ubuntu 18.10 – Odysseas May 30 '19 at 20:04
  • Thanks it helped. – lovalim Jul 19 '19 at 11:49
  • Worked, and I didn't even have to close all programs using pulseaudio. – NumerousHats Sep 11 '19 at 11:40

I have a similar problem on a Dell XPS-13-9350 running Ubuntu 18.04.3 LTS. I've updated to the most recent released linux kernel. After a reboot, the system does not detect my sound card, and shows "Dummy Output" as the sound output, and I have no sound of any kind. But, then in a terminal window I run:

'pactl load-module module-detect'

Settings->Sound then shows "Built-in Audio Analog Stereo" as the sound output and all sound works fine... Until I reboot again.... I have to run the pactl command every time after a reboot...


I had the same problem with Asus PRIME H310M-R R2.0 motherboard. MattB, your solution solved my problem too, thank you. So I added it to end of PulseAudio configuration file:

echo "load-module module-detect" | sudo tee -a /etc/pulse/default.pa

Now you don't have to run it each time after reboot.

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