I am attempting to follow the advice of this question, using the xinput tool to enable natural scrolling for my mouse's scroll wheel.
I list my input devices via $ xinput list and get the following:
$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=11 [slave pointer (2)]
⎜ ↳ TPPS/2 IBM TrackPoint id=12 [slave pointer (2)]
⎜ ↳ Dell Dell USB Optical Mouse id=14 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Sleep Button id=8 [slave keyboard (3)]
↳ Integrated Camera id=9 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=10 [slave keyboard (3)]
↳ ThinkPad Extra Buttons id=13 [slave keyboard (3)]
The relevant device is the Dell Dell USB Optical Mouse id=14. I list the properties of that device via $ xinput list-props 14, and get
$ xinput list-props 14
Device 'Dell Dell USB Optical Mouse':
Device Enabled (140): 1
Coordinate Transformation Matrix (142): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (266): 0
Device Accel Constant Deceleration (267): 1.000000
Device Accel Adaptive Deceleration (268): 1.000000
Device Accel Velocity Scaling (269): 10.000000
Device Product ID (260): 16700, 12306
Device Node (261): "/dev/input/event12"
Evdev Axis Inversion (306): 0, 0
Evdev Axes Swap (308): 0
Axis Labels (309): "Rel X" (150), "Rel Y" (151), "Rel Vert Wheel" (775)
Button Labels (310): "Button Left" (143), "Button Middle" (144), "Button Right" (145), "Button Wheel Up" (146), "Button Wheel Down" (147), "Button Horiz Wheel Left" (148), "Button Horiz Wheel Right" (149)
Evdev Scrolling Distance (311): 1, 1, 1
Evdev Middle Button Emulation (312): 0
Evdev Middle Button Timeout (313): 50
Evdev Third Button Emulation (314): 0
Evdev Third Button Emulation Timeout (315): 1000
Evdev Third Button Emulation Button (316): 3
Evdev Third Button Emulation Threshold (317): 20
Evdev Wheel Emulation (318): 0
Evdev Wheel Emulation Axes (319): 0, 0, 4, 5
Evdev Wheel Emulation Inertia (320): 10
Evdev Wheel Emulation Timeout (321): 200
Evdev Wheel Emulation Button (322): 4
Evdev Drag Lock Buttons (323): 0
Which (if any) of these can I change to reverse the scroll wheel direction?
I tried adjusting the Evdev Axis Inversion (306) property via command $ xinput set-prop 14 306 1, 1, but that is apparently for mouse movement direction, not scroll wheel direction -- I had to change that back.
Do any of these xinput settings reverse the scroll wheel direction? If not then perhaps I will need to try another method. My OS is Ubuntu 16.04.2 LTS.
