> 8.2 | Shutdown of the Operating System

> If the supported operating system has been installed in ACPI mode, the power supply will be automatically switched off. This power down might cause pulses on those signals of the serial interfaces which are responsible for switching the module on. This may happen, even if it had been correctly switched off before by the driver.
> If the module has its own power supply it might stay switched on after the shutdown procedure of the computer has completed.