title: Xfce: restart xfce without logging out with new display configuration
body: <p>I have a problem with the support of my dual screen after a suspend. I set up my laptop with xrandr to use only an external screen with the laptop screen off. Then I did a suspend. Then back to home with no external screen when I wake up my laptop I get of course a blank screen for my laptop screen.</p>
  
  <p>How to set up the display to use the laptop screen without logging out from my xfce session?</p>
  
  <p>Thanks for your help.</p>