I'm trying to get my laptop to switch the audio to HDMI when it's plugged in, and back to standard analog when it's removed.

I set up a udev rule to trigger a script to perform the switching, however I'm having problems getting it to work:

• It appears that until I select the HDMI Audio output in the Sound Settings, it is not recognised as a available sink, also once the HDMI Audio output is selected, the analog output is no longer listed.

See the below:

# HDMI plugged in, not selected in Sound settings.

$ pactl list short sinks 

5   alsa_output.pci-0000_00_1b.0.analog-stereo  module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED

kingamajick@kingamajick-laptop: ~



# HDMI selected in sound settings    

$ pactl list short sinks 

7   alsa_output.pci-0000_00_1b.0.hdmi-stereo    module-alsa-card.c  s16le 2ch 48000Hz   SUSPENDED

kingamajick@kingamajick-laptop: ~



# HDMI removed

$ pactl list short sinks 

9   alsa_output.pci-0000_00_1b.0.analog-stereo  module-alsa-card.c  s16le 2ch 48000Hz   SUSPENDED

The script I'm using the toggle the output is as follows:

#!/bin/bash

HDMI_STATUS=`cat /sys/class/drm/card0/*HDMI*/status`

INPUTS=($(pacmd list-sink-inputs | grep index | awk '{print $2}'))



if [ $HDMI_STATUS = "connected" ]

then

    pactl set-default-sink alsa_output.pci-0000_00_1b.0.hdmi-stereo

    for i in ${INPUTS

}; do pacmd move-sink-input $i alsa_output.pci-0000_00_1b.0.hdmi-stereo  &> /dev/null; done

else

    pactl set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo

    for i in ${INPUTS
[*]}; do pacmd move-sink-input $i alsa_output.pci-0000_00_1b.0.analog-stereo  &> /dev/null; done-server $PULSE_SERVER set-card-profile 0 output:analog-stereo+input:analog-stereo

fi

The script gives an error about no such sink when I trigger it before I select HDMI in the sound settings.