Correct, DPMS is the cause of it. If you don't want to disable DPMS for fear it may break something else, add this to your xorg.conf:
Section "ServerFlags" Option "blank time" "0" Option "standby time" "0" Option "suspend time" "0" Option "off time" "0" EndSection
Correct, DPMS is the cause of it. If you don't want to disable DPMS for fear it may break something else, add this to your xorg.conf:
Section "ServerFlags"
Option "blank time" "0"
Option "standby time" "0"
Option "suspend time" "0"
Option "off time" "0"
EndSection