srandrd's Introduction

SRANDRD(1) Manual Page

NAME

srandrd - simple randr daemon

SYNOPSIS

srandrd [OPTIONS] COMMAND|list

list: List outputs and EDIDs and terminate

OPTIONS

-h: Print help and exit
-n: Don’t fork to background
-V: Show version information and exit
-v: Verbose output
-e: Emit connected devices at startup

DESCRIPTION

srandrd(1) is a tool that executes a command on xrandr output change events, i.e. if a monitor is plugged or unplugged. By default srandrd forks to background and exits if the xserver exits.

The following variables are defined:

SRANDRD_OUTPUT defines the name of the graphics card output / port that triggered the event, e.g. DVI-0.

SRANDRD_EVENT defines the event that happened. It’s one of the following:

[connected|disconnected|unknown]

SRANDRD_EDID defines a semi-unique identifier of the monitor that has been connected. The identifier is usually not unique (the same) within a monitor series. The identifier has this format:

VENDOR[4]PRODUCT[4]SERIAL[8]

SRANDRD_SCREENID defines the xinerama screen id (if available). The identifier has this format:

XINERAMA_SCREENID[1..n]

EXAMPLE

An example usage could be

srandrd display_handler

where display_handler being the following script

#!/bin/sh

case "${SRANDRD_OUTPUT} ${SRANDRD_EVENT}" in
  "DVI-0 connected") xrandr --output DVI-0 --auto --right-of LVDS;;
  "VGA-0 connected") xrandr --output VGA-0 --auto --left-of LVDS;;
esac