Comment 4 for bug 1241421

My regular setup is a laptop with an external monitor and when I have the external monitor connected, I want to disable to built-in laptop screen.

After upgrading to 13.10, my previous display configuration stopped working.

However, I was finally able to get it similar to before by:

1) renaming ~/.config/monitors.xml (or deleting it)
2) running nvidia-settings and saving xorg.conf to /etc/X11/xorg.conf
3) running System Settings -> Screen Display to match it with nvidia-settings

Both screens are active during the login screen, but upon login, my settings take effect.

I was experimenting with the above three steps so that might not be the exact order of changes and interspersed with reboots.