change-monitor.sh

#!/usr/bin/env bash

set -o nounset
set -o errexit

[[ "$EUID" -eq 0 ]] || exec sudo /bin/bash -c "$(printf '%q ' "$BASH_SOURCE" "$@")"


declare -A source=( [0x0f]="DP" [0x11]="HDMI" )
declare -A inputMap=( [0x0f]=0x11 [0x11]=0x0f )

monitor1=$(ddcutil getvcp --display 1 60 | sed -n "s/.*(sl=\(.*\))/\1/p")
monitor2=$(ddcutil getvcp --display 2 60 | sed -n "s/.*(sl=\(.*\))/\1/p")

echo "Monitor 1 = ${source[$monitor1]}; Monitor 2 = ${source[$monitor2]}"

monitor1NewInput=${inputMap[$monitor1]}
monitor2NewInput=${inputMap[$monitor2]}

echo "Monitor 1 = ${source[$monitor1NewInput]}; Monitor 2 = ${source[$monitor2NewInput]}"

ddcutil setvcp --display 1 60 $monitor1NewInput
ddcutil setvcp --display 2 60 $monitor2NewInput