Step-by-step – Trackball Scroll Elementary OS Setup Guide

Setting up

2. 2. Installing Xinput

   Now to Install Xinput Utility for Elementary OS
   Simply play:

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   sudo apt install xinput

   Again, to manage your Input Devices install also evdev and some others Input Utilities like:

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   sudo apt install xserver-xorg-input-evdev xserver-xorg-input-libinput xserver-xorg-input-mouse

3. 3. Finding out Device Name

   So to Display Devices List
   Run:

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   xinput list

   Select & Copy Device’s Name with Ctrl+x.

   

   Or simply take note of the Device’s ID.
   But if No Device Name but “xwayland” on GNOME Wayland then instead follow the linked Guide:

   

   How to Set up Trackball Scroll Wheel Emulation on GNOME Wayland

   Here Trackball Scroll Wheel Wayland Guide

   How to Enable Trackball Scroll Wheel Emulation on GNU/Linux Wayland Desktops

4. 4. Setting up Xinput Device Emulation

   Now to Enable Xinput Device Emulation on Elementary OS
   First, to list the available Properties run:

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   xinput list-props "[DEVICENAME]"

   Or alternatively:

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   xinput list-props [DEVICEID]

   So in this case for instance:

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   xinput list-props "Kensington      Kensington Expert Mouse"

   Or else:

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   xinput list-props 13

   

   But if the “Wheel Emulation” Property is Not Found then you have to configure Evdev in Xorg like:

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   sudo cp /usr/share/X11/xorg.conf.d/10-evdev.conf /etc/X11/xorg.conf.d/

   And then Reboot with:

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   sudo reboot

   Next to set up a Trackball Wheel Scroll, first enable it:

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   xinput --set-prop "Kensington      Kensington Expert Mouse" "Evdev Wheel Emulation" 1

   So alternatively easier using the ID like:

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   xinput --set-prop 13 "Evdev Wheel Emulation" 1

   And then set the Target Button:

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   xinput --set-prop 13 "Evdev Wheel Emulation Button" 2

   How to Find the Trackball Button ID

   Here Find Device Button on Elementary OS

   How to Find the Trackball Button Number on Elementary OS

5. 5. Making Permanent Config

   Last, to make a Permanent Xinput Configuration File
   For a Single User using the nano editor, put your both Commands into:

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   nano ~/.xsessionrc

   Ctrl+x to Save & Exit from nano Editor.
   So the setup should be consistent also after Reboot.