Comment # 2 on bug 960360 from Dean Martin

Just to comment/clarify a little further - although the user found that
invoking 'synclient TouchpadOff=1' had no effect, the inclusion of the
following udev rule (running the same command) did apparently work

#/etc/udev/rules.d/01-touchpad.rules

SUBSYSTEM=="input", KERNEL=="mouse[0-9]*", ACTION=="add", ENV{DISPLAY}=":0",
ENV{XAUTHORITY}="/home/username/.Xauthority", RUN+="/usr/bin/synclient
TouchpadOff=1"
SUBSYSTEM=="input", KERNEL=="mouse[0-9]*", ACTION=="remove", ENV{DISPLAY}=":0",
ENV{XAUTHORITY}="/home/username/.Xauthority", RUN+="/usr/bin/synclient
TouchpadOff=0"