130

Every time I boot up I have to switch my audio output device to my "Line Out" headphones because for some reason my microphone defaults as a speaker.

See this screenshot [See this screenshot.

2
  • I use this solution with Ubuntu 20 => askubuntu.com/a/908534/292232 May 25 '20 at 19:30
  • At least you got the screenshot done when the dropdown list was shown - that's more than I can do on Ubuntu 20.04 ...
    – Trunk
    Feb 20 at 14:23
85

Simple fix in 19.10 that worked for me:

I couldn't get the solution @singrium proposed to persist on Ubuntu 19.10. It worked with device numbers in /etc/pulse/default.pa but as I connected for example my headset device numbers were changing and things stopped working. It didn't work with device names in /etc/pulse/default.pa.

The simple workaround I found is adding the pactl set default sink command in startup applications.

  1. Run: pactl list short sinks
  2. Note the device name you want to use as default
  3. Try to run: pactl set-default-sink <Your_Device_Name>
    This should work without giving you an error message.
  4. Open the application "Startup Applications" (Should be preinstalled on Ubuntu)
  5. Click on "Add"
  6. Give your startup item a name
  7. Copy your command from above into the command field:
    pactl set-default-sink 'Your-Device-Name'
  8. Click on "Save".

You are now good to go. Your default audio device will be set on each boot and as such be persistent. If you want to change the default device simply edit the device name in startup applications command.

11
  • After an hour of trying, this is the only thing that worked for me, with a tweak to add 10 seconds delay: /bin/bash -c "sleep 10 && pactl set-default-sink 'alsa_output.pci-0000_07_00.1.hdmi-stereo-extra2'"
    – dez93_2000
    Mar 16 '20 at 19:59
  • 1
    Marking this answer as the new solution. This method is simpler and doesn't involve editing or deleting config files and I've had some users mention that the earlier marked answer caused issues with their system. May 2 '20 at 0:37
  • Thank you phanky5 for the simple solution.
    – singrium
    May 3 '20 at 11:51
  • 1
    which value is the device name? Jun 8 '20 at 23:35
  • assuming you want your audio-out as hdmi (such as for a TV) and your os keeps picking something else (like a gaming headset), here is a one-liner to put in startup apps (with appropriate delay): /usr/bin/pactl set-default-sink $(/usr/bin/pactl list short sinks|/usr/bin/gawk -F'\\s+' '$2 ~ /^.*[Hh][Dd][Mm][Ii].*$/ { print $2 }')
    – zpangwin
    Jul 12 '20 at 22:48
76

EDIT (05/03/2020):
It seems that @phanky5 figured out a simpler solution. Please check it before you try this one.


Here is a well explained tutorial to set a default audio input/output.

First: List the audio output devices using

pactl list short sources  

Example of the output:

pactl list short sources
0   alsa_output.pci-0000_02_00.1.hdmi-stereo.monitor    module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED
1   alsa_input.usb-AVerMedia_Technologies__Inc._Live_Gamer_Portable_2_5202050100060-03.analog-stereo    module-alsa-card.c  
2   alsa_output.usb-Blue_Microphones_Yeti_Stereo_Microphone_REV8-00.analog-stereo.monitor   module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED
3   alsa_input.usb-Blue_Microphones_Yeti_Stereo_Microphone_REV8-00.analog-stereo    module-alsa-card.c  s16le 2ch 44100Hz   RUNNING

Second: To set a default output device run the command

pactl set-default-sink <'output_device_name'>

Example: pactl set-default-sink 'alsa_output.pci-0000_00_1f.3.analog-stereo'

Now, to make this work at every restart, follow this :

First, open the file /etc/pulse/default.pa using :

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

Then scroll to the bottom of the file, where two lines starting with set- will be commented out.

Now, uncomment these lines and replace the words input and output with the number of the sink (for output) / source (for input) that you want to be the default.

Example (sets both default input and output):

### Make some devices default
set-default-sink 3
set-default-source 3

PS: As discussed in the comments with Bim, it is also possible (according to him) to put the input/output name in /etc/pulse/default.pa instead of the input/output number.

Example:

### Make some devices default
set-default-sink alsa_output.pci-0000_00_1f.3.analog-stereo
set-default-source alsa_output.pci-0000_00_1f.3.analog-stereo.monitor

After doing this, save and exit. Then, delete the ~/.config/pulse directory by running rm -r ~/.config/pulse, and then reboot the system. Once the system reboots, the appropriate devices should now be set as the defaults.



EDIT:
As mentioned by ahmorris in his answer, some had to comment this line load-module module-switch-on-connect in the file /etc/pulse/default.pa to be # load-module module-switch-on-connect in order to make the changes persistent.

13
  • 3
    The user owns the home directory, so sudo isn't required when running sudo rm -r ~/.config/pulse
    – BenR
    Aug 24 '18 at 13:21
  • 2
    I think you mixed up sinks with sources in your first example output. Oct 3 '19 at 17:53
  • It makes more sense to use the name string ('alsa_output.pci-0000_00_1f.3.analog-stereo' in the example) for set-default-sink, than the device number. The number can change, that name will most likely not...
    – Bim
    Oct 30 '19 at 13:56
  • @Bim I have the names changed too :-D. Both names and numbers change from one computer to another, I guess.
    – singrium
    Oct 30 '19 at 14:06
  • 2
    @singrium you say use pactl list short sinks and in the example below you use pactl list short sources. It is a little confusing. Nov 3 '19 at 13:58
33

To make Singrium's answer work, I had to comment out this line from my /etc/pulse/default.pa by adding the #:

# load-module module-switch-on-connect

Otherwise, on startup my audio device would be set to my default device, but then would switch to my USB hub once it was detected. This prevents that switch and ensures your chosen audio device is the output.

4
  • 3
    This was my problem too! I have a wireless headset connected through a hub which gets detected AFTER my default device has been set on start up, cheers for this one.
    – SidOfc
    Jul 30 '19 at 17:38
  • 1
    Was necessary for me with a HDMI output / display that can also act as an audio device.
    – Bim
    Oct 30 '19 at 13:51
  • 3
    This answer alone does the job if you just need to stop a USB headset stealing your audio on every startup. Jan 26 '20 at 10:04
  • 1
    Why can't Ubuntu/Debian just send the audio to every available output, like Windows always did?
    – Rodrigo
    Apr 7 '20 at 15:35
9

This can be done with PulseAudio Volume Control if you prefer to use a GUI.

Once you've opened PulseAudio Volume Control, choose the configuration (the last tab), then select the output and/or input you want to use from the profile dropdown menu. It should look similar to this

PulseAudio Volume Control can also be used to adjust volume levels for each input, output, system sounds and applications that are currently in use.

Here's a post from Linuxhint with more info on PulseAudio.

5
  • Thanks for this solution. I start to regret having upgraded to 18.04.1. PulseAudio Volume Control disappeared too >:( Oct 2 '18 at 23:56
  • 1
    I should mention, I'm using Ubuntu studio, which has a few differences. although I did notice pulse was missing after the upgrade. 18.04 uses ALSA, but Pulse can be installed. Maybe this (same post from above) will help: linuxhint.com/pulse_audio_sounds_ubuntu
    – Starbuck
    Oct 5 '18 at 16:36
  • 1
    Yeah, I did that and worked :) Thx :) Oct 6 '18 at 18:56
  • For me this won't remember my TV (hdmi) output, if logged out, or disconnected/reconnected, it's back to speakers. Dec 16 '19 at 0:52
  • Why can't Ubuntu/Debian just send the audio to every available output, like Windows always did?
    – Rodrigo
    Apr 7 '20 at 15:36
9

This worked for me in Ubuntu 20.04.

Like was said before you have to list the audio output devices:

pactl list short sinks

And than you can add your chosen device to /etc/pulse/client.conf file like this:

default-sink = alsa_output.pci-0000_00_1f.3.analog-stereo

NOTE: You have to remove the "!" from the original line. In Ubuntu 20.10, you have to remove the ";" from the original line.

1
  • 2
    Recently had to fix my pulse setup since upgrading from 19.10 to 20.04 brought all kinds of audio weirdness. I decided to remove ~/.config/pulse and was left with one quirk being my headset becoming the default audio device. If this is the case this answer: askubuntu.com/a/1115641/177314 works like a charm too and requires less technical knowledge :)
    – SidOfc
    May 22 '20 at 9:45
3

In my case, on my Bionic/18.04.3 changes in /etc/pulse/default.pa doesn't works (1)!

pactl list short sink
…
2   alsa_output.pci-0000_00_1f.3.analog-stereo …

pactl set-default-sink 2 
# or 
pactl set-default-sink 'alsa_output.pci-0000_00_1f.3.analog-stereo'

works fine in CLI,

make change in my ~/.profile based on post How to startup a script automatically after login, add line:

pactl set-default-sink 'alsa_output.pci-0000_00_1f.3.analog-stereo'

and it works after reboot

(1) I have some error en my /var/log/syslog in all case with number or all text:
[pulseaudio] main.c: Sink output 2 does not exist.
[pulseaudio] main.c: Sink output 'alsa_output.pci-0000_00_1f.3.analog-stereo' does not exist.

1

I found this answer that worked for me.

https://itectec.com/ubuntu/ubuntu-how-to-change-the-default-audio-device-from-command-line/

You can ignore the bit about having to change via command line, the bit that fixed the audio devices resetting was editing the /etc/pulse/default.pa file. Change line load-module module-stream-restore to load-module module-stream-restore restore_device=false and then restart pulse audio with pulseaudio -k.

You should now be able to update the audio sink and source via settings > sound and they should persist past a log out/in and system restart.

0

Ubuntu already stores the last selected audio device across reboots. Just things like USB docking stations or HDMI devices might mess up this mechanism, because they are detected as last device during boot and Ubuntu thinks, they just got connected.

So the most simple solution would be in many cases, only to comment the automatic switching on connect (load-module module-switch-on-connect) as outlined in this answer: https://askubuntu.com/a/1115641/39966

All the set-default-sink / -source commands or configurations may be not needed in most of the cases.

At the end of the day this was / is a bug in Ubuntu, which is at least for HDMI devices considered to be solved in recent versions. There is still another open bug for USB devices.

See also Selected Sound Output Device Not Persisting Between Reboots in gnome-control-center

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