Easy monitor switch

monitor.sh

#!/bin/bash
# see help section below for script description

# change the four "constants" below to match your config

# this is the xrandr monitor name for the "temporary" monitors you connect often on your laptop,
# via the HDMI or VGA cable directly, for projecting on TV or whatever
DEFAULT_OTHER_MONITOR="VGA-1"
# this is the xrandr monitor name of your usual external monitor you use 99% of the time
DEFAULT_WORK_MONITOR="DP-2"
DEFAULT_POSITION="above"
INTERNAL_MONITOR="LVDS-1"

cmd="${1}"
other_monitor="${2:-$DEFAULT_OTHER_MONITOR}"
mode="${3:-$DEFAULT_POSITION}"
internal_monitor=$INTERNAL_MONITOR
work_monitor=$DEFAULT_WORK_MONITOR
active_monitors=$(xrandr | grep -E " connected (primary )?[1-9]+" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/")

if [[ $other_monitor == "above" || $other_monitor == "below" ||
    $other_monitor == "left-of" || $other_monitor == "right-of" ]]; then
    mode=$other_monitor
    other_monitor=$DEFAULT_OTHER_MONITOR
fi

external_monitor=$other_monitor
if xrandr -q | grep -q "^$other_monitor connected"; then
    external_monitor="$other_monitor"
elif xrandr -q | grep -q "^$work_monitor connected"; then
    external_monitor="$work_monitor"
else
    echo 'No external monitor connected.'
    cmd="in"
fi

internal_is_active=0
if [[ $active_monitors == *"$internal_monitor"* ]]; then
    internal_is_active=1
fi

external_is_active=0
if [[ $active_monitors == *"$external_monitor"* ]]; then
    external_is_active=1
fi

current_state=""
next_state=""
if [[ $internal_is_active -eq 1 && $external_is_active -eq 1 ]]; then
    current_state="all"
    next_state="in"
elif [[ $internal_is_active -eq 1 ]]; then
    current_state="in"
    next_state="out"
else
    current_state="out"
    next_state="all"
fi

case "$cmd" in
    -h|--help|'')
        echo "Toggle your laptop monitor and one external monitor with ease"
        echo ""
        echo "Usage:"
        echo ""
        echo -e "\e[92m${0##*/} all [monitor_name] [position]\e[39m"
        echo "  activate both the internal and the external monitor"
        echo ""
        echo "  [monitor_name] is optional and lets you specify the external monitor xrandr name."
        echo "  By default, the scripts looks for connected monitors named, in order,"
        echo "  \"$other_monitor\" and \"$work_monitor\" if no monitor_name is given."
        echo ""
        echo "  [position] is optional and lets you specify the position of the external monitor"
        echo "  around the internal one: above, below, left-of and right-of. Default is \"$DEFAULT_POSITION\"."
        echo ""
        echo -e "\e[92m${0##*/} in [monitor_name]\e[39m"
        echo "  activate only the internal monitor"
        echo ""
        echo "  [monitor_name] works the same as in the \`all\` command. Specifying this here will"
        echo "  make the script turn off the given monitor and the fallback \"$work_monitor\"."
        echo ""
        echo -e "\e[92m${0##*/} out [monitor_name]\e[39m"
        echo "  activate only the external monitor"
        echo ""
        echo "  [monitor_name] works the same as in the \`all\` command."
        echo ""
        echo -e "\e[92m${0##*/} switch [monitor_name] [position]\e[39m"
        echo "  call this script with the next possible state"
        echo ""
        echo "  states are switched in order: all, in, out."
        echo "  [monitor_name] and [position] work the same as in the \`all\` command."
        ;;
    status)
        echo "current state: $current_state"
        echo "next switch state: $next_state"
        echo "internal monitor xrandr name: $internal_monitor"
        echo "external monitor xrandr name: $external_monitor"
        ;;
    all)
        echo xrandr --output "$internal_monitor" --primary --auto --output "$external_monitor" --auto "--$mode" "$internal_monitor"
        xrandr --output "$internal_monitor" --primary --auto --output "$external_monitor" --auto "--$mode" "$internal_monitor" > /dev/null &
        ;;
    in)
        echo xrandr --output "$internal_monitor" --auto --output "$other_monitor" --off --output "$work_monitor" --off
        xrandr --output "$internal_monitor" --auto --output "$other_monitor" --off --output "$work_monitor" --off > /dev/null &
        ;;
    out)
        echo --output "$internal_monitor" --off  --output "$external_monitor" --auto
        xrandr --output "$internal_monitor" --off  --output "$external_monitor" --auto > /dev/null &
        ;;
    switch)
        echo $0 $next_state $other_monitor $mode
        $0 $next_state $other_monitor $mode
        ;;
    *)
        echo "Command '$cmd' not supported."
esac

exit 0

Thanks, but I still can't use it, will try to connect to TV via hdmi cable, don't know if tv will support it 😅😅