Thinkpad T480タッチパッド：垂直スクロールを有効にする（DEなし）、どの設定を使用する必要がありますか？

libinputを使うのか、シナプティックを使うのかはどちらも使うので、わかりません。

Xorgシナプスの設定

cat /etc/X11/xorg.conf.d/70-synaptics.conf 
# Example xorg.conf.d snippet that assigns the touchpad driver
# to all touchpads. See xorg.conf.d(5) for more information on
# InputClass.
# DO NOT EDIT THIS FILE, your distribution will likely overwrite
# it when updating. Copy (and rename) this file into
# /etc/X11/xorg.conf.d first.
# Additional options may be added in the form of
#   Option "OptionName" "value"
#
Section "InputClass"
        Identifier "touchpad catchall"
        Driver "synaptics"
    MatchDevicePath "/dev/input/event*"
        MatchIsTouchpad "on"
        # OWN SHIT
        Option "PalmDetect" "1"
        Option "PalmMinWidth" "3"
        Option "PalmMinZ" "50"
        Option "VertScrollDelta" "30"
        Option "HorizScrollDelta" "500"

# This option is recommend on all Linux systems using evdev, but cannot be
# enabled by default. See the following link for details:
# http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html
#       MatchDevicePath "/dev/input/event*"
EndSection

Section "InputClass"
        Identifier "touchpad ignore duplicates"
        MatchIsTouchpad "on"
        MatchOS "Linux"
        MatchDevicePath "/dev/input/mouse*"
        Option "Ignore" "on"
        # OWN SHIT
        Option "PalmDetect" "1"
        Option "PalmMinWidth" "4"
        Option "PalmMinZ" "50"
        Option "VertScrollDelta" "30"
        Option "HorizScrollDelta" "500"
EndSection

# This option enables the bottom right corner to be a right button on clickpads
# and the right and middle top areas to be right / middle buttons on clickpads
# with a top button area.
# This option is only interpreted by clickpads.
Section "InputClass"
        Identifier "Default clickpad buttons"
        MatchDriver "synaptics"
        Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
        Option "SecondarySoftButtonAreas" "58% 0 0 15% 42% 58% 0 15%"
EndSection

# This option disables software buttons on Apple touchpads.
# This option is only interpreted by clickpads.
Section "InputClass"
        Identifier "Disable clickpad buttons on Apple touchpads"
        MatchProduct "Apple|bcm5974"
        MatchDriver "synaptics"
        Option "SoftButtonAreas" "0 0 0 0 0 0 0 0"
EndSection

このスクリプトを使ってスクロール速度を設定しましたが、:

#!bin/bash
# MOUSE SCRIPT
# xinput, permanent, run at startup
# touchpad scroll speed config

# >> TOUCHPAD
# Scroll speed
xinput set-prop "Synaptics TM3276-022" "Synaptics Scrolling Distance" 300, 100

# >> TRACKPOINT
# Scroll speed
xinput set-prop "TPPS/2 IBM TrackPoint" "libinput Scrolling Pixel Distance" 50

このスクリプトを使用してトラックポイントの速度を設定しました。

#!bin/bash
# Trackpoint speed controll config
xinput --set-prop "TPPS/2 IBM TrackPoint" "libinput Accel Profile Enab
led" 1, 0

xinput --set-prop "TPPS/2 IBM TrackPoint" "libinput Accel Speed" 0.40

使用する構成やシステムで使用する構成をご存知ですか？