touchpad.md

Touchpad

Synaptics and evdev are going away, things must be reconfigured for libinput. xf86-input-libinput is probably already around and installed, synaptics just took precedence.

1. pacman -Rcs xf86-input-synaptics xf86-input-evdev
2. move away XX-synaptics.conf in /etc/X11/xorg.conf.d
3. restart x
4. try to double tap with touchpad, realize it's not working, be sad

Check device id: ID=$(xinput list | grep Synaptics | grep -o -E "id=[0-9]+" | grep -o -E "[0-9]+")

List of possible settings for runtime configuration: xinput list-props $ID

Fox X create libinput settings: ne /etc/X11/xorg.conf.d/10-libinput.conf and check the xorg libinput man page for a list of props.

Unfortunately synclient had much much more options, but so it goes. The touchpad on the x230 is a piece of crap anyway, so no real harm done.

Section "InputClass"
  Identifier      "touchpad"
  MatchProduct    "SynPS/2 Synaptics TouchPad"
  Driver          "libinput"
  Option          "Tapping" "true"
  Option          "TappingDrag" "true"
  Option          "DisableWhileTyping" "true"
  Option          "HorizontalScrolling" "false"
  Option          "ScrollMethod" "twofinger"
EndSection

/etc/X11/xorg.conf.d/10-libinput.conf (END)

Toggle the touchpad

The palm detection is useless, so I usually have a shortcut key assigned in fluxbox to disable the touchpad while I write longer texts.

#!/bin/bash
xdotool mousemove 0 0
ID=$(xinput list | grep Synaptics | grep -o -E "id=[0-9]+" | grep -o -E "[0-9]+")
STATE=$(xinput list-props $ID | grep "Device Enabled" | grep --color=never -o -E "\\s[01]" | awk '{$1=$1};1')
if [ $STATE == "0" ]; then STATE=1; else STATE=0; fi;
xinput set-prop $ID "Device Enabled" $STATE

Legacy

An example synaptics configuration (NOT usable with libinput of course):

Section "InputClass"
        Identifier "touchpad"
        MatchProduct "SynPS/2 Synaptics TouchPad"
        Driver "synaptics"
        Option "VertResolution" "100"
        Option "HorizResolution" "65"
        Option "MinSpeed" "1"
        Option "MaxSpeed" "1"
        Option "AccelerationProfile" "2"
        Option "AdaptiveDeceleration" "8"
        Option "ConstantDeceleration" "8"
        Option "VelocityScale" "32"
        #Option "AccelerationNumerator" "30"
        #Option "AccelerationDenominator" "10"
        #Option "AccelerationThreshold" "10"
        Option "TapButton2" "0"
        Option "TapButton1" "1"
        Option "HorizHysteresis" "100"
        Option "VertHysteresis" "100"
        Option "VertScrollDelta" "500"
        Option "CoastingSpeed" "5"
        Option "MaxTapTime" "250"
        Option "MaxTapMove" "800"
        Option "LockedDrags" "1"
        Option "LockedDragTimeout" "350"
        Option "PalmDetect" "1"
        Option "PalmMinWidth" "8"
        Option "PalmMinZ" "100"
EndSection

/etc/X11/xorg.conf.d/50-synaptics.conf (END)