MorphOS has an option to disable the touchpad since 3.10, these other harder ways are obsolete now (unless the new option only works for certain hw, but should work for this new PB, and most likely for all devices with a touchpad).

See this setting in your system: MorphOS System settings -> Touchpad -> Enable the Touchpad driver


[ Edited by jPV 14.08.2018 - 11:17 ]