I use my "Line Out - Built-in Audio" for my speakers, but for some reason, every time I reboot my computer, it changes by default to "Digital Output (S/PDIF) - Built-in Audio".

The funny thing is that, if I unplug and re-plug my speaker connector, the channel changes by itself to "Line Out" without me having to do anything.

What could I do so that I can stop doing this annoying step every day?

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2 Answers 2


You can have pulse audio stay on the last selected output source no matter what:

sudo -H gedit /etc/pulse/default.pa

Find this line:

load-module module-switch-on-port-available

and change it to:

# load-module module-switch-on-port-available

An additional step is needed as listed in:

We need to add the line:

set-sink-port <name|index>  analog-output-headphones

The name or index of the active sink, and available ports can be displayed with pactl list sinks. The way I spelled analog-output-lineout may be incorrect.

Save the file and exit.

Restart pulse audio with:

pulseaudio -k

In your sound settings select "Line Out" and it will always stay connected even if you physically unplug it.

  • It did not work :/ Sep 8, 2019 at 11:16
  • @EnriqueMorenoTent I've revised the answer with a similar problem's solution. Sep 8, 2019 at 16:50
  • I don't have a set-sink-port command. In the default.pa there is a load-module module-switch-on-connect. Could that be relevant? Sep 8, 2019 at 20:20
  • I'm not sure. I must confess I'm not an expert and struggle with pulseaudio and alsa myself many times. Sep 8, 2019 at 20:55

I have multiple audio devices connected:

  • Internal sound card
  • Speakers via HDMI monitor
  • USB Mic and headphone adapter

As suggested by Enrique in a comment to WinnEunuuchs2Unix answer, I commented out the line load-module module-switch-on-connect in my /etc/pulse/default.pa and it solved my problems of having the primary audio device change every boot.

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