Currently, at work I use the laptop onnected to an external display with xinerma support. At home or while traveling the laptop is used standalone.

Therefore I needed a following solution to select either Single-Display or Xinerama at login.

For this purpose have a look at the GDM extension here

And don’t forget to check the following settings / issues:

• File :0 requires that xterm and xautoload are stored in certain locations. Make shure the files are present there or link them accordingly
• In XLayoutChooser dat the path to your xorg.conf to your configuration.

That’s it… have fun 🙂