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.

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    thanks, but it didn't work – Filipe Jode Feb 11 '19 at 17:35
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    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
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    This worked for me in 20.04 – Pedro Rolo Apr 25 at 15:50

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.

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  • Thanx... this command worked for me (Ubuntu 20.04 on dell vostro 2520). – Deepak May 9 at 11:07

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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  • I was just looking at my /etc/pulse/default.pa file, and it already contains the "load-module module-detect" command but its wrapped in ".ifexists module-udev-detect.so; load-module module-udev-detect; .else load-module module-detect; .endif – MattB May 10 at 17:08
  • As I remember my config file also had this line but somewhere in the middle and maybe also wrapped in some if sentence. I just added it in the end and sound started working. It solved my problem so I skipped going deeper into details. – st0at May 11 at 18:13

Add this follow lines to /etc/modprobe.d/alsa-base.conf

options snd-hda-intel model=generic
options snd-hda-intel dmic_detect=0

Then reboot the system

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