You have to write a bash script, then make it executable, then add that script to the Startup Applications list. Sorry if this sounds too basic for the terminal-savvy. I did it like this (on ubuntu 12.04):

– make script:
Open terminal, press ctrl+alt+t;
Type ‘cd Documents’, so the script will be made in there;
Type ‘nano Default-Monitor’, to open the text editor and make the script;
Type:
‘#!/bin/bash
xrandr –output VGA-0 –primary’
(ctrl+X to exit, make sure to save)

– set as executable
Type: ‘chmod 755 Default-Monitor’

– Set to run on startup
Open Startup Applications; click Add; browse to Documents and click on Default-Monitor, your program. It should be added to the list and next time you boot the script will run automatically. It seems to work for any profile.

Again, sorry if this sounds condescending but it worked for me and a month ago I’d have had no idea how to do this unless it was written this simply.

Is there anybody getting identical RSS issues? Anyone that knows the solution can you kindly respond?
Thanx!!