Prevent screen from blank out can be hardcore in Linux.
setterm -blank 0
setterm -powerdown 0
setterm -powersave off
xset s off
xset -dpms
This must help from screen blanking.
P.S.
setterm -blank 0 - turn off console timeout blanking;
setterm -powerdown 0 - VESA powerdown interval;
setterm -powersave off - turns off monitor VESA powersaving features;
xset s off - turn off X screensaver;
xset -dpms - turn off DPMS (Energy Star) features.
