Comment 150 for bug 296610

@Antti: From what I can tell, this is not possible completely, as the hardware itself merges the two datastreams to some degree. It would be reasonably simple to disable the touchpad part and hardware tapping, the buttons on the touchpad are a different issue. So if you can live with the touchpad buttons and just want the touchpad to stop moving your pointer, yes, that is possible (though the option is not implemented yet).