Как отключить отключение экрана в debian jessie&mate?

#!/bin/bash
 
TIMEOUT_STANDBY=60
TIMEOUT_SUSPEND=900
TIMEOUT_OFF=0
 
xset -dpms -display ":0.0"
while :
do
    DPMS_STATUS=$(xset q | grep 'DPMS is' | awk '{print $3}')
    VLC_PID=$(pgrep vlc)
    if [ "$VLC_PID" == "" ]
    then
        if [ "$DPMS_STATUS" == "Disabled" ]
        then
            xset +dpms -display ":0.0" dpms $TIMEOUT_STANDBY $TIMEOUT_SUSPEND $TIMEOUT_OFF
        fi
    else
        if [ "$DPMS_STATUS" == "Enabled" ]
        then
            xset -dpms -display ":0.0"
        fi
    fi
    sleep 1
done