sammy44nts

# At the end of /etc/mdm/Init/Default, I added the folowing code:

# Only display one screen:
screens="$(xrandr -q | grep -o "^.*[[:digit:]] connected" | tr -d ' connected')"
display_off="$(echo $screens | sed -e 's/^.*[[:digit:]] //')"
display_on="$(echo $screens | sed -e 's/ .*$//')"

if [ "$display_on" != "$display_off" ]; then
xrandr --output "$display_off" --off --output "$display_on" --auto --primary --preferred
fi