can you give instructions on how to do the override?
The synaptics config file can be copied to /etc/X11/xorg.conf.d
and given a higher number than the /usr/share/X11/xorg.conf.d synaptics.conf default. Then the synaptics touchpad driver overrides the libinput touchpad driver by having a higher priority.
There is an option that could be added to libinput.conf to prevent the libinput touchpad driver from being considered. After "MatchIsTouchpad" add:
Option "Ignore" "true"
Check with xinput:
xinput list
xinput --list-props "whatever touchpad from above list"
That will show either the libinput or the synaptics properties if the touchpad is using libinput or synaptics respectively. The synaptics touchpad driver should show output something like this:
Device 'ELAN1300:00 04F3:3057 Touchpad':
Device Enabled (152): 1
Coordinate Transformation Matrix (154): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (280): 1
Device Accel Constant Deceleration (281): 1.000000
Device Accel Adaptive Deceleration (282): 1.000000
Device Accel Velocity Scaling (283): 1.000000
Synaptics Edges (284): 0, 3208, 0, 2210
Synaptics Finger (285): 1, 70, 0
Synaptics Tap Time (286): 180
Synaptics Tap Move (287): 171
Synaptics Tap Durations (288): 180, 180, 100
Synaptics ClickPad (289): 1
Synaptics Middle Button Timeout (290): 0
Synaptics Two-Finger Pressure (291): 282
Synaptics Two-Finger Width (292): 7
Synaptics Scrolling Distance (293): 154, 77
Synaptics Edge Scrolling (294): 0, 0, 0
Synaptics Two-Finger Scrolling (295): 1, 0
Synaptics Move Speed (296): 1.000000, 1.000000, 0.000000, 0.000000
Synaptics Off (297): 0
Synaptics Locked Drags (298): 0
Synaptics Locked Drags Timeout (299): 5000
Synaptics Tap Action (300): 0, 0, 0, 0, 0, 0, 0
Synaptics Click Action (301): 1, 3, 2
Synaptics Circular Scrolling (302): 0
Synaptics Circular Scrolling Distance (303): 0.100000
Synaptics Circular Scrolling Trigger (304): 0
Synaptics Circular Pad (305): 0
Synaptics Palm Detection (306): 1
Synaptics Palm Dimensions (307): 10, 200
Synaptics Coasting Speed (308): 20.000000, 50.000000
Synaptics Pressure Motion (309): 30, 160
Synaptics Pressure Motion Factor (310): 1.000000, 1.000000
Synaptics Grab Event Device (311): 1
Synaptics Gestures (312): 1
Synaptics Capabilities (313): 1, 0, 0, 1, 1, 0, 0
Synaptics Pad Resolution (314): 32, 31
Synaptics Area (315): 0, 0, 0, 0
Synaptics Soft Button Areas (316): 1604, 0, 1800, 0, 0, 0, 0, 0
Synaptics Noise Cancellation (317): 50, 50
Device Product ID (276): 1267, 12375
Device Node (275): "/dev/input/event15"
The synaptics touchpad driver allows for adjusting many settings when the libinput driver just turns a few things on or off and so is not useful for my touchpad.
Couldn't find synaptics properties. No synaptics driver loaded?