Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
@jamieweb Perfect Thanks
@jamieweb You can also take a look at repowerd, it seems to be the deamon that is handling the power button : launchpad repowerd I see some event of it in syslog when pressing the power button.