Power button

Hello,

I add to the bbb an external button in pin 9.9. I add to the image the acpid package to the IMAGE_INSTALL.

When I press the power down button nothing happens. No power down message in the console.

I'm sure the button is right connected because if I press button during more or less 8 seconds, the bbb powers off.

When I enter in /dev/input/ there isn't any event0 or event1. Only mice.

Why does not exits this events like beaglebone official image? How can I add this events?

I'm using Krogoth with kernel 4.4

Thanks in advance