This in section "Monitor":

Option "ConnectedMonitor" "DFP"

Option "ModeValidation" "NoMaxSizeCheck, NoHorizSyncCheck, NoVertRefreshCheck"
Option "AllowGLXWithComposite" "true"

Modeline "1280x720_60" 74.18 1280 1390 1430 1650 720 725 730 750 +HSync +Vsync