If the "Touchpad" section of KDE System Settings shows the "No touchpad found" message, try removing the xf86-input-synaptics package.
- Thinkpad L480 touchpad issues Christos Margiolis
- Re: Thinkpad L480 touchpad issues Gleb Popov
- Re: Thinkpad L480 touchpad issues Gleb Popov
- Re: Thinkpad L480 touchpad issues Alexey Sukhoguzov