pos/pos_customer_display/pos_customer_display_demo.xml

<?xml version="1.0" encoding="utf-8"?>

<openerp>
<data noupdate="1">


<record id="point_of_sale.pos_config_main" model="pos.config">
    <field name="iface_customer_display" eval="True"/>
</record>


</data>
</openerp>