set_trackpoint_sensitivity_x220.sh

#!/bin/bash

# This script is for setting TrackPoint sensitivity/speed/acceleration
# on a ThinkPad X220 to something reasonable since neither maxing out
# the UI mouse sensitivity nor maxing out /sys/devices options
# were getting the sensitivity high enough on their own.

SYSFS_PATH="/sys/devices/platform/i8042/serio1"

echo 0 > ${SYSFS_PATH}/inertia

# keep these at maximum unless lowering xinput values
# doesn't get the sensitivity low enough for you
echo 200 > ${SYSFS_PATH}/resolution
echo 200 > ${SYSFS_PATH}/rate
echo 255 > ${SYSFS_PATH}/sensitivity
echo 255 > ${SYSFS_PATH}/speed

# increase for acceleration
xinput set-prop "TPPS/2 IBM TrackPoint" "Device Accel Constant Deceleration" 1.4

# increase for more speed
xinput set-prop "TPPS/2 IBM TrackPoint" "Device Accel Velocity Scaling" 45.0

# this one doesn't have a whole lot of effect
xinput set-prop "TPPS/2 IBM TrackPoint" "Device Accel Adaptive Deceleration" 3.0