I see. That is then the dpms default timing taking over. Looks like this has changed in buster. The default there is 600 seconds so 10 minutes and does not get set in current screen saver script. Will be fixed in next image. But you can also just replace content of /usr/local/Repetier-Setup/bin/screensaver with
#!/bin/bash
# Implements commands
# screensaver on - Called when screensaver should activate
# screensaver off - Called when screensaver should be inactive
# screensaver config <0/1> <time> - Set time for screensaver. <0/1> enables/disable function.
export LC_ALL=C
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
cd $DIR
CMD=$1
P1=$2
P2=$3
case $CMD in
on)
# Add code to run on screensaver activation
if [[ -e "/dev/backlight-1wire" ]]; then
echo 0 > /dev/backlight-1wire
fi
;;
off)
# Add code to run on screensaver deactivation
if [[ -e "/dev/backlight-1wire" ]]; then
echo 80 > /dev/backlight-1wire
fi
;;
config)
export DISPLAY=:0
if [[ "$P1" == "0" ]] ; then
xset s off
xset -dpms
xset dpms 0 0 0
xset s noblank
xset s reset
echo "Screensaver disabled"
else
xset s on
xset +dpms
xset dpms 0 0 $P2
xset s blank
xset s $P2
echo "Screensaver enabled"
fi
;;
esac
which is the source for next image screen saver script.
