Headphone Issue/Evtest

Output of evtest checking on HDA Intel PCHHeadphone, ran on command line of Linux Mint Sarah 4.8.0-42-generic.

No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:	Lid Switch
/dev/input/event1:	Sleep Button
/dev/input/event2:	Power Button
/dev/input/event3:	AT Translated Set 2 keyboard
/dev/input/event4:	Video Bus
/dev/input/event5:	Video Bus
/dev/input/event6:	Asus Wireless Radio Control
/dev/input/event7:	Asus WMI hotkeys
/dev/input/event8:	HDA Intel PCH Headphone
/dev/input/event9:	HDA Intel PCH HDMI/DP,pcm=3
/dev/input/event10:	HDA Intel PCH HDMI/DP,pcm=7
/dev/input/event11:	HDA Intel PCH HDMI/DP,pcm=8
/dev/input/event12:	Elan Touchpad
/dev/input/event13:	USB2.0 VGA UVC WebCam
Select the device event number [0-13]: 8
Input driver version is 1.0.1
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "HDA Intel PCH Headphone"
Supported events:
  Event type 0 (EV_SYN)
  Event type 5 (EV_SW)
    Event code 2 (SW_HEADPHONE_INSERT) state 0
Properties:
Testing ... (interrupt to exit)
^C