Comment 7 for bug 1510919

2015-10-28 13:40:25,358 - WARNING - QQmlExpression: Expression file:///usr/share/ubuntu/settings/system/qml-plugins/about/DevMode.qml:94:30 depends on non-NOTIFYable properties:
2015-10-28 13:40:25,358 - WARNING - StorageAbout::developerMode
2015-10-28 13:40:33,696 - WARNING - QQmlExpression: Expression file:///usr/share/ubuntu/settings/system/qml-plugins/about/DevMode.qml:94:30 depends on non-NOTIFYable properties:
2015-10-28 13:40:33,697 - WARNING - StorageAbout::developerMode

These warnings I assume come to the line [1]. If the property value is false during the Switch.checked property initialization, the actual value will not be updated to the Switch, as the property it is bound to has no notify signal.

[1] http://bazaar.launchpad.net/~system-settings-touch/ubuntu-system-settings/trunk/view/head:/plugins/about/DevMode.qml#L94