Touchpad Tapping
================

On this Dell laptop the touchpad isn't a "Synaptics" device and I
can't use synclient to disable tapping.

I found a way using xinput

xinput

gives list of devices:


g4slv@antix1:~$ xinput
Virtual core pointer               id=2	[master pointer  (3)]
  Virtual core XTEST pointer       id=4	[slave  pointer  (2)]
  DELL081B:00 044E:120A Mouse      id=11 [slave  pointer  (2)]
  DELL081B:00 044E:120A Touchpad   id=12 [slave  pointer  (2)]


the device is id 12

xinput list-props 12 shows what the tapping is (348)


g4slv@antix1:~$ xinput list-props 12
Device 'DELL081B:00 044E:120A Touchpad':
	Device Enabled (186):	1
	...
	libinput Tapping Enabled (348):	1


use xinput set-prop to change Tapping Enabled (348) to 0 to disable
tapping

xinput set-prop 12 348 0

For scrolling I prefer the old "edge" scroll, rather than
"two-finger" scroll.

xinput list-props 12

	libinput Scroll Methods Available (327):	1, 1, 0
	libinput Scroll Method Enabled (328):	0, 1, 0
	libinput Scroll Method Enabled Default (329):	1, 0, 0

Default = 1, 0, 0 which is "two-finger"
Enabled = 0, 1, 0 which is "Edge" (I've already changed it to
this...)

the command:

xinput set-prop 12 328 0 1 0

will chage it to "Edge"

A script will automate both, and account for different id and
property numbers on different hardware.

############################################################

#!/bin/bash

TPDevice=$( xinput | sed -nre '/TouchPad|Touchpad/s/.*id=([0-9]*).*/\1/p' )

tap=$( xinput list-props "$TPDevice" | grep "Tapping Enabled" | \
grep -v Default | sed -nE 's/.*\(([0-9]+)\).*/\1/p' )

scroll=$( xinput list-props "$TPDevice" | grep "Scroll Method Enabled" | \
grep -v Default | sed -nE 's/.*\(([0-9]+)\).*/\1/p' )

xinput set-prop $TPDevice $scroll 0 1 0
xinput set-prop $TPDevice $tap 0

#############################################################

I had to cheat and ask ChatGPT for the sed instruction to pull out
the "348" from the output of xinput list-props

sed is a mystery to me, and I must try to get my head around it.

This script can be called by i3-wm by putting it in
.config/i3/config


exec --no-startup-id ~/tap_off.sh