« DD-WRT WiFi was working, now it's not | My 3D scan from Hot Pop Factory rendered using SketchFab's 3D web tools » |
By opening System Settings > Displays you can change your "primary" screen by dragging the black little bar to the display you want and hit the Apply button. ( from http://askubuntu.com/questions/113246/permanantly-set-monitor-as-primary)
Copy the configuration file over to the gdm settings
cp ~/.config/monitors.xml /var/lib/gdm/.config/ (from http://askubuntu.com/questions/11738/force-gdm-login-screen-to-the-primary-monitor)