with 4.4.0-143 showkey -s returns: 0xe0 0x73 0xe0 0xf3
$ acpi_listen button/wlan WLAN 00000080 00000000 K
with 4.4.0-143 showkey -s returns:
0xe0 0x73 0xe0 0xf3
$ acpi_listen
button/wlan WLAN 00000080 00000000 K