I can't disable natural scrolling, and I have tried disabling and enabling it from the Mouse and touch-pad settings. I'm using GNOME Shell 3.24.1. I have already tried these commands:

gsettings set org.gnome.desktop.peripherals.mouse natural-scroll false

gsettings set org.gnome.desktop.peripherals.touchpad natural-scroll false

I am a beginner in Ubuntu. Please suggest me step by step procedure to rectify this.

PS: My scrolling in the mouse is fine. The only problem is with the touch-pad.

$ xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech Wireless Mouse id=10 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=13 [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)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ HP Wide Vision HD id=11 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ HP WMI hotkeys id=14 [slave keyboard (3)]
↳ HP Wireless hotkeys id=15 [slave keyboard (3)]
$ xinput list-props 13
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (170): 1
Coordinate Transformation Matrix (172): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (300): 1
Device Accel Constant Deceleration (301): 2.500000
Device Accel Adaptive Deceleration (302): 1.000000
Device Accel Velocity Scaling (303): 12.500000
Synaptics Edges (323): 1659, 5337, 1531, 4401
Synaptics Finger (324): 25, 30, 0
Synaptics Tap Time (325): 180
Synaptics Tap Move (326): 238
Synaptics Tap Durations (327): 180, 180, 100
Synaptics ClickPad (328): 1
Synaptics Middle Button Timeout (329): 0
Synaptics Two-Finger Pressure (330): 282
Synaptics Two-Finger Width (331): 7
Synaptics Scrolling Distance (332): 108, 108
Synaptics Edge Scrolling (333): 1, 0, 0
Synaptics Two-Finger Scrolling (334): 1, 0
Synaptics Move Speed (335): 1.000000, 1.750000, 0.036880, 0.000000
Synaptics Off (336): 0
Synaptics Locked Drags (337): 0
Synaptics Locked Drags Timeout (338): 5000
Synaptics Tap Action (339): 2, 3, 0, 0, 1, 3, 0
Synaptics Click Action (340): 1, 3, 0
Synaptics Circular Scrolling (341): 0
Synaptics Circular Scrolling Distance (342): 0.100000
Synaptics Circular Scrolling Trigger (343): 0
Synaptics Circular Pad (344): 0
Synaptics Palm Detection (345): 0
Synaptics Palm Dimensions (346): 10, 200
Synaptics Coasting Speed (347): 20.000000, 50.000000
Synaptics Pressure Motion (348): 30, 160
Synaptics Pressure Motion Factor (349): 1.000000, 1.000000
Synaptics Resolution Detect (350): 1
Synaptics Grab Event Device (351): 0
Synaptics Gestures (352): 1
Synaptics Capabilities (353): 1, 0, 0, 1, 1, 1, 1
Synaptics Pad Resolution (354): 53, 36
Synaptics Area (355): 0, 0, 0, 0
Synaptics Soft Button Areas (356): 3498, 0, 4033, 0, 0, 0, 0, 0
Synaptics Noise Cancellation (357): 27, 27
Device Product ID (293): 2, 7
Device Node (292): "/dev/input/event7"