Why it doesn't work
My system, Kubuntu 19.10 on a Dell XPS 13 9350, detects headphones and sets the correct output automatically.
As fas as I know it doesn't know if the headset has a microphone or not. This is why it only changes the output and not the input.
How to make it work
This is how to automatically switch the microphone on plug/unplug:
acpi_listen is the tool to detect when you plug/unplug the headset. This is what it detects:
jack/headphone HEADPHONE unplug
jack/headphone HEADPHONE plug
pulseaudio is where we can switch source ports
In my system to select headset microphone:
pacmd set-source-port alsa_input.pci-0000_00_1f.3.analog-stereo analog-input-headset-mic
To select internal microphone:
pacmd set-source-port alsa_input.pci-0000_00_1f.3.analog-stereo analog-input-internal-mic
You can use pacmd list-cards to get a list of sources names and ports names.
You can also use the terminal auto-complete feature to help craft the commands.
Now, let's bring everything together:
Switch to root with sudo su and create the script /etc/acpi/headset-microphone.sh
#!/bin/sh
export PULSE_RUNTIME_PATH="/run/user/1000/pulse/"
if [ "$1" = plug ]; then
sudo -u you -E pacmd set-source-port alsa_input.pci-0000_00_1f.3.analog-stereo analog-input-headset-mic
else
sudo -u you -E pacmd set-source-port alsa_input.pci-0000_00_1f.3.analog-stereo analog-input-internal-mic
fi
be sure to:
- change
you to your username
- replace the pulseaudio source and ports with your values
- make the script executable,
chmod a+x /etc/acpi/headset-microphone.sh
then create the event listener, creating a file ´/etc/acpi/events/headset-microphone-plug´:
event=jack/headphone HEADPHONE plug
action=/etc/acpi/headset-microphone.sh plug
and the unplug event listener, creating a file ´/etc/acpi/events/headset-microphone-unplug´:
event=jack/headphone HEADPHONE unplug
action=/etc/acpi/headset-microphone.sh unplug
and, as last thing, restart the acpi listening events service
systemctl restart acpid.service
