Your touchpad is #9. If you run this command, you'll get more details about that device's properties:
This is what my touchpad (#11 for me) looks like. I have mine disabled. But, maybe some other properties might stand out as different.
$ xinput list-props 11
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (148): 0
Coordinate Transformation Matrix (150): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (278): 1
Device Accel Constant Deceleration (279): 2.000000
Device Accel Adaptive Deceleration (280): 1.000000
Device Accel Velocity Scaling (281): 12.500000
Synaptics Edges (303): 1511, 5433, 1272, 4602
Synaptics Finger (304): 25, 30, 0
Synaptics Tap Time (305): 180
Synaptics Tap Move (306): 263
Synaptics Tap Durations (307): 180, 180, 100
Synaptics ClickPad (308): 0
Synaptics Middle Button Timeout (309): 75
Synaptics Two-Finger Pressure (310): 282
Synaptics Two-Finger Width (311): 7
Synaptics Scrolling Distance (312): 119, 119
Synaptics Edge Scrolling (313): 1, 1, 1
Synaptics Two-Finger Scrolling (314): 1, 1
Synaptics Move Speed (315): 1.000000, 2.000000, 0.075000, 0.000000
Synaptics Off (316): 0
Synaptics Locked Drags (317): 0
Synaptics Locked Drags Timeout (318): 5000
Synaptics Tap Action (319): 0, 9, 0, 8, 1, 2, 3
Synaptics Click Action (320): 1, 1, 1
Synaptics Circular Scrolling (321): 1
Synaptics Circular Scrolling Distance (322): 0.100000
Synaptics Circular Scrolling Trigger (323): 7
Synaptics Circular Pad (324): 0
Synaptics Palm Detection (325): 0
Synaptics Palm Dimensions (326): 10, 200
Synaptics Coasting Speed (327): 8.000000, 50.000000
Synaptics Pressure Motion (328): 30, 160
Synaptics Pressure Motion Factor (329): 1.000000, 1.000000
Synaptics Grab Event Device (330): 0
Synaptics Gestures (331): 1
Synaptics Capabilities (332): 1, 0, 1, 1, 1, 1, 1
Synaptics Pad Resolution (333): 77, 51
Synaptics Area (334): 0, 0, 0, 0
Synaptics Noise Cancellation (335): 8, 8
Device Product ID (270): 2, 7
Device Node (271): "/dev/input/event7"
You can set those properties with this command, for example:
$ xinput set-prop 9 "Device Enabled" 0
That's the command I use to disable my touchpad (which is #11. Yours is #9).
FWIW: there is also a "synclient" command which might be easier to work with. My synclient output is:
$ synclient
Parameter settings:
LeftEdge = 1511
RightEdge = 5433
TopEdge = 1272
BottomEdge = 4602
FingerLow = 25
FingerHigh = 30
MaxTapTime = 180
MaxTapMove = 263
MaxDoubleTapTime = 180
SingleTapTimeout = 180
ClickTime = 100
EmulateMidButtonTime = 75
EmulateTwoFingerMinZ = 282
EmulateTwoFingerMinW = 7
VertScrollDelta = 119
HorizScrollDelta = 119
VertEdgeScroll = 1
HorizEdgeScroll = 1
CornerCoasting = 1
VertTwoFingerScroll = 1
HorizTwoFingerScroll = 1
MinSpeed = 1
MaxSpeed = 2
AccelFactor = 0.075
TouchpadOff = 0
LockedDrags = 0
LockedDragTimeout = 5000
RTCornerButton = 0
RBCornerButton = 9
LTCornerButton = 0
LBCornerButton = 8
TapButton1 = 1
TapButton2 = 2
TapButton3 = 3
ClickFinger1 = 1
ClickFinger2 = 1
ClickFinger3 = 1
CircularScrolling = 1
CircScrollDelta = 0.1
CircScrollTrigger = 7
CircularPad = 0
PalmDetect = 0
PalmMinWidth = 10
PalmMinZ = 200
CoastingSpeed = 8
CoastingFriction = 50
PressureMotionMinZ = 30
PressureMotionMaxZ = 160
PressureMotionMinFactor = 1
PressureMotionMaxFactor = 1
GrabEventDevice = 0
TapAndDragGesture = 1
AreaLeftEdge = 0
AreaRightEdge = 0
AreaTopEdge = 0
AreaBottomEdge = 0
HorizHysteresis = 8
VertHysteresis = 8
ClickPad = 0
Some of those settings are documented at:
https://wiki.archlinux.org/index.php/Touchpad_SynapticsThere is a package named "touchpad-indicator" which you can install with "sudo apt-get install touchpad-indicator". That might give you some configurability. (I haven't installed this package in years. I don't use Peppermint at the moment, I'm planning to try it soon. In theory it should be ok to install that package. But... I don't know for sure.).
