The Raspberry Pi doesn't support power management of any kind. It simply can't go into suspend or soft power-off because it doesn't have the hardware to do it.

The Raspberry Pi doesn't support power management of any kind. It simply can't go into suspend or soft power-off because it doesn't have the hardware to do it. In theory the C.H.I.P can but I'm not sure if the software support for that feature is there yet.