tl-archconfig/tlconfig-gui/10-dpms.conf

Section "Monitor"
	Identifier "eDP1"
	Option "DPMS" "false"
EndSection

Section "ServerLayout"
	Identifier "ServerLayout0"
	Option "StandbyTime" "0"
	Option "SuspendTime" "0"
	Option "OffTime"     "0"
	Option "BlankTime"   "0"
EndSection