Linux
Arch
KDE
Xorg
Install xinput:
sudo pacman -S xorg-xinput
Get the hardware id of the touch pad:
xinput
Disable the middle mouse button:
xinput set-button-map 17 1 0 3 4 5 6 7 8 9 10 11 12
If it works, make it permanent on x startup:
echo "xinput set-button-map 17 1 0 3 4 5 6 7 8 9 10 11 12" >> ~/.xsessionrc