Display profile switcher using nvidia-settings

display-switcher.sh

#!/bin/bash

exec > >(tee -a "/tmp/display-switcher.log") 2>&1

# NOTE: This requires GNU getopt.  On Mac OS X and FreeBSD, you have to install this
# separately; see below.

usage() {
  cat << HELP >&2
Usage: $0 [option ...] {profile}

OPTIONS:

  -h, --help                        This help message
  -v, --verbose                     Enable verbose mode
  -w N, --wait N                    Seconds to wait before changing profile
  -m TEXT, --message TEXT           Text to display as a notification
  -t SECS, --message-timeout SECS   How long (seconds) to display the notification for
  -u NAME, --user NAME              User to use for X11 notifications
HELP
}

msg() {
  if $VERBOSE; then
    echo "[$(date)] $1"
  fi
}

if ! TEMP=$(getopt -o hvt:u:m:w: --long verbose,help,user:,message:,message-timeout:,wait: -n 'display-switcher' -- "$@"); then
  usage
  exit 1
fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

VERBOSE=false
WAIT=0
MESSAGE="Switching display profile to %s soon..."
NOTIFY_USER=
NOTIFY_UID=
NOTIFY_ARGS=
ICON="/usr/share/icons/Pop/48x48/devices/gnome-dev-computer.svg"
while true; do
  case "$1" in
    -v | --verbose ) VERBOSE=true; shift ;;
    -w | --wait ) WAIT="$2"; shift 2 ;;
    -m | --message ) MESSAGE="$2"; shift 2 ;;
    -t | --message-timeout ) NOTIFY_ARGS="${NOTIFY_ARGS} -t ${2}000"; shift 2 ;;
    -u | --user )
      NOTIFY_USER="$2"
      shift 2
      if ! NOTIFY_UID="$(id -u ${NOTIFY_USER} 2>/dev/null)"; then
        echo "ERROR: Unable to get UID for ${NOTIFY_USER}."
        exit 1
      fi
      ;;
    -h | --help ) usage; exit 0 ;;
    -- ) shift; break ;;
    * ) break ;;
  esac
done

if [[ -z ${NOTIFY_USER} ]]; then
  echo "ERROR: You need to specify the username for the authorized X user to use for notifications."
  usage
  exit 1
fi

NOTIFY_CMD="sudo -u ${NOTIFY_USER} DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/${NOTIFY_UID}/bus dunstify -I ${ICON}"

# nvidia-settings -q dpys
BENQ_4K_EDID="DPY-EDID-ead0ac88-15bf-e410-e2a5-8538dcd8450d"
LG_5K_EDID="DPY-EDID-79885171-ff0f-23e3-0566-988d08123861"
NOTEBOOK_EDID="DPY-EDID-703b6c15-6e68-abf3-2744-8a1b0abf4d39"

# nvidia-settings -q CurrentMetaMode | tr '\n' ' '
PROFILE=${1}
case "${PROFILE}" in
  laptop-only)
    MODE="${NOTEBOOK_EDID}: 3840x2160 @3840x2160 +0+0 {ViewPortIn=3840x2160, ViewPortOut=3840x2160+0+0}"
    ;;
  5k-4k-vertical-laptop)
    MODE="${BENQ_4K_EDID}: 3840x2160 @2160x3840 +4096+0 {ViewPortIn=2160x3840, ViewPortOut=3840x2160+0+0, Rotation=90}, ${LG_5K_EDID}: 4096x2304 @4096x2304 +0+0 {ViewPortIn=4096x2304, ViewPortOut=4096x2304+0+0}, ${NOTEBOOK_EDID}: 3840x2160 @3840x2160 +6256+0 {ViewPortIn=3840x2160, ViewPortOut=3840x2160+0+0}"
    ;;
  5k-4k-vertical-no-laptop)
    MODE="${BENQ_4K_EDID}: 3840x2160 @2160x3840 +4096+0 {ViewPortIn=2160x3840, ViewPortOut=3840x2160+0+0, Rotation=90}, ${LG_5K_EDID}: 4096x2304 @4096x2304 +0+0 {ViewPortIn=4096x2304, ViewPortOut=4096x2304+0+0}"
    ;;
  *)
    usage
    echo -e "\\nERROR: You need to specify a valid profile to switch to."
    exit 1
    ;;
esac

msg Starting...

msg "Notify command: ${NOTIFY_CMD}"

FINAL_MSG=$(printf "${MESSAGE}" ${PROFILE})
msg "Sending notification: ${NOTIFY_CMD} ${NOTIFY_ARGS} \"${FINAL_MSG}\""
${NOTIFY_CMD} ${NOTIFY_ARGS} "${FINAL_MSG}"

if [[ ${WAIT} -gt 0 ]]; then
  msg "Sleeping for ${WAIT} seconds"
  sleep "${WAIT}"
fi

# Finally, run nvidia-settings.
msg "Running: nvidia-settings --assign \"CurrentMetaMode=${MODE}\""
nvidia-settings --assign "CurrentMetaMode=${MODE}"

${NOTIFY_CMD} -t 3000 "Display profile has been switched"