With the default xorg.conf, usually you just plug in your second monitor and type 'startx -- :1' for your presentations... it is annoything that if I'm working

With the default xorg.conf, usually you just plug in your second monitor and type 'startx -- :1' for your presentations... it is annoything that if I'm working on the train (one screen) and I get to work, I have to start a new X session. I think xrandr solves this issue but it's not ready for me yet.