#!/bin/bash
if [ `xset -q | grep "DPMS is" | awk '{print $3}'` == "Disabled" ]; then
        xset +dpms &
        else
        xset -dpms &
fi

#!/bin/bash
while getopts ":ab" option ;
do
    case $option in
        a) xset s on &&  xset +dpms &
        ;;
        b) xset s off && xset -dpms &
        ;;
        esac
done