Desabilitar Tap to Click touchpad via Xorg

##One way to do it is by adding a file called 10-synaptics.conf in the directory /etc/X11/xorg.conf.d (create the ##directory if it does not exist). In this file you can put something like

Section "InputClass"
    Identifier "touchpad catchall"
    Driver "synaptics"
    MatchIsTouchpad "on"
    MatchDevicePath "/dev/input/event*"
    Option "MaxTapTime"             "0"
EndSection

##if MaxTapTime is the option you want to set. Note that the name of the file is not important, and you could as well ##use 10-notouchpadtap.conf. The number however is used to define the order in which the configuration files are used ##by the system.