Easy xRandr settings.

dualscreen.sh

#!/bin/sh
# GistID: 5163520

usage () {
    echo "Usage: $0 OPTION
Change multi-head display settings.
Options:
    -a      Do something reasonable
    -0      Laptop
    -1      Laptop + VGA
    -2      Laptop + Rotated VGA
    -3      Laptop + DisplayPort
    -4      Laptop + Rotated DisplayPort
    -5      VGA + DisplayPort
    -6      VGA + Rotated DisplayPort
    -7      Rotated VGA + Rotated DisplayPort
    -8      DisplayPort + Rotated VGA
    -9      Rotated DisplayPort + Rotated VGA"
}

args=()

kill_display() {
    while [[ $# > 0 ]]; do
        args+=(--output "$1" --off)
        shift
    done
}

main() {
    args+=(--output "$1" --primary --rotate "$2" --pos 0x0 --auto)
}

aux() {
    args+=(--output "$1" --rotate "$2" --right-of "$3"  --auto)
}

if [[ $# == 0 ]]; then
    usage
    exit 1
fi

while getopts ":0123456789a" opt; do
    case $opt in
        0)
            kill_display DP1 VGA1
            main LVDS1 normal
            ;;
        1)
            kill_display DP1
            main LVDS1 normal
            aux VGA1 normal LVDS1
            ;;
        2)
            kill_display DP1
            main LVDS1 normal
            aux VGA1 left LVDS1
            ;;
        3)
            kill_display VGA1
            main LVDS1 normal
            aux DP1 normal LVDS1
            ;;
        4)
            kill_display VGA1
            main LVDS1 normal
            aux DP1 left LVDS1
            ;;
        5)
            kill_display LVDS1
            main VGA1 normal
            aux DP1 normal VGA1
            ;;
        6)
            kill_display LVDS1
            main VGA1 normal
            aux DP1 left VGA1
            ;;
        7)
            kill_display LVDS1
            main VGA1 left
            aux DP1 left VGA1
            ;;
        8)
            kill_display LVDS1
            main DP1 normal
            aux VGA1 left DP1
            ;;
        9)
            kill_display LVDS1
            main DP1 left
            aux VGA1 left DP1
            ;;
        a)
            disp=($(xrandr | perl -nE 'say $1 if /(\w+) connected/ and not /^LVDS/'))
            nodisp=($(xrandr | perl -nE 'say $1 if /(\w+) disconnected/'))
            echo ${disp[@]} ${#disp[@]}
            if [[ ${#disp[@]} == 2 ]]; then
                kill_display LVDS1
                main $disp[0] normal
                aux $disp[1] normal $disp[0]
            elif [[ ${#disp[@]} == 1 ]]; then
                kill_display ${nodisp[@]}
                main LVDS1 normal
                aux $disp normal LVDS1
            else
                kill_display ${nodisp[@]}
                main LVDS1 normal
            fi
            ;;
        \?)
            usage
            exit 1
            ;;
    esac
done

echo xrandr "${args[@]}"
xrandr "${args[@]}"