Disable mouse acceleration and adjust mouse speed in Linux (used on a Mint install)

mousefix.sh

#!/bin/bash
# Mouse Speed Fix by Nick Andren, January 2021

# How fast we want the pointer to move
mouseSpeed=8.0

# One of the problems that I've had with many Linux window managers is that they
# don't allow adjustments to *only* the mouse speed without mouse acceleration.
# This solution might not work for all types of mice, but in my case, it works
# with my Microsoft IntelliMouse. Even if you don't have one of these, this
# might help someone else who is like me and prefers a constant high speed with
# no acceleration.

# xinput will list the machine's various input devices along with their IDs
# It can also show the properties of each device. In our case, we want to see
# the main pointer's acceleration and coordinate transformation matrix. Other
# mice may have these listed differently, or may not have them available at all.
# Your mileage may vary.

# First, let's grab the mouse ID
mouseId=$(xinput --list --short | sed -n 's/^.*Microsoft Microsoft® Classic IntelliMouse®.*id=\([0-9]\+\).*/\1/p')

if [ -z "$mouseId" ]
then
    exit 0;
fi

# Next, we'll look up the coordinate transformation matrix and the acceleration
# speed. The matrix is used to determine the speed of the pointer.
coordinateTransformationMatrix=$(xinput list-props "$mouseId" | grep "Coordinate Transformation Matrix" | sed -n 's/^.*Coordinate Transformation Matrix (\([0-9]\+\)):.*/\1/p')
libinputAccelSpeed=$(xinput list-props "$mouseId" | grep 'libinput Accel Speed (' | sed -n 's/^.*libinput Accel Speed (\([0-9]\+\)).*/\1/p')

# Disable mouse acceleration
xinput set-prop "$mouseId" "$libinputAccelSpeed" -1

# Set the pointer speed 
# Note the two instances of mouseSpeed here for the X and Y coordinates
xinput set-prop "$mouseId" "$coordinateTransformationMatrix" "$mouseSpeed", 0, 0, 0, "$mouseSpeed", 0, 0, 0, 1