A couple of months ago I upgraded from Ubuntu 16.04 to 18.04 as one of many steps in attempting to fix my wireless drivers.
Ever since the upgrade, however, natural scrolling has been broken. Rather, it's been stuck on.
When I go to Settings > Devices > Mouse & Touchpad
it doesn't matter if I set Natural Scrolling
to on or off, it's always on. When I two-finger scroll up, the page goes down. When I two-finger scroll down, the page goes up.
What makes this even more confusing is that natural scrolling doesn't affect horizontal scrolling. So a two-finger scroll right will move the page right and a two-finger scroll left will move the page left. This discrepancy between vertical and horizontal behavior has made it impossible for me to just adapt and get used to the new mouse mechanics.
I tried uninstalling xserver-xorg-input-synaptics
(per Ubuntu 17.10 natural scrolling) however this did not change anything (other than free up 180 MB of disk space)
Minor Update
Uninstalling the Synaptics drivers may have had some affect - but not a positive one. I've started to notice that scrolling will randomly stop working entirely in certain apps or on certain web pages until I restart the app. Natural scrolling is still stuck on, but it goes from being annoying to being outright nonfunctional as the trackpad doesn't scroll at all after some time.
I'm reinstalling the Synaptics driver and we'll see if my scrolling remains consistent.
Output of xinput
{9:04}|~ >xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ AlpsPS/2 ALPS DualPoint TouchPad id=13 [slave pointer (2)]
⎜ ↳ AlpsPS/2 ALPS DualPoint Stick 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)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ Integrated_Webcam_HD: Integrate id=10 [slave keyboard (3)]
↳ Dell WMI hotkeys id=11 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ DELL Wireless hotkeys id=15 [slave keyboard (3)]
Output of xinput list-props 13
{9:37}|~ >xinput list-props 13
Device 'AlpsPS/2 ALPS DualPoint TouchPad':
Device Enabled (142): 1
Coordinate Transformation Matrix (144): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (269): 1
Device Accel Constant Deceleration (270): 2.500000
Device Accel Adaptive Deceleration (271): 1.000000
Device Accel Velocity Scaling (272): 12.500000
Synaptics Edges (273): 441, 2503, 230, 1306
Synaptics Finger (274): 12, 15, 0
Synaptics Tap Time (275): 0
Synaptics Tap Move (276): 146
Synaptics Tap Durations (277): 180, 180, 100
Synaptics ClickPad (278): 0
Synaptics Middle Button Timeout (279): 75
Synaptics Two-Finger Pressure (280): 141
Synaptics Two-Finger Width (281): 7
Synaptics Scrolling Distance (282): 66, 66
Synaptics Edge Scrolling (283): 0, 0, 0
Synaptics Two-Finger Scrolling (284): 1, 1
Synaptics Move Speed (285): 1.000000, 1.750000, 0.060241, 0.000000
Synaptics Off (286): 0
Synaptics Locked Drags (287): 0
Synaptics Locked Drags Timeout (288): 5000
Synaptics Tap Action (289): 0, 0, 0, 0, 1, 3, 2
Synaptics Click Action (290): 1, 3, 2
Synaptics Circular Scrolling (291): 0
Synaptics Circular Scrolling Distance (292): 0.100000
Synaptics Circular Scrolling Trigger (293): 0
Synaptics Circular Pad (294): 0
Synaptics Palm Detection (295): 1
Synaptics Palm Dimensions (296): 10, 100
Synaptics Coasting Speed (297): 20.000000, 50.000000
Synaptics Pressure Motion (298): 15, 80
Synaptics Pressure Motion Factor (299): 1.000000, 1.000000
Synaptics Resolution Detect (300): 1
Synaptics Grab Event Device (301): 0
Synaptics Gestures (302): 1
Synaptics Capabilities (303): 1, 1, 1, 1, 1, 1, 0
Synaptics Pad Resolution (304): 31, 31
Synaptics Area (305): 0, 0, 0, 0
Synaptics Noise Cancellation (306): 16, 16
Device Product ID (266): 2, 8
Device Node (265): "/dev/input/event7"
xinput
terminal command.xinput list-props 13