Você deve ter synclient
:
$ apropos synaptics
synaptics (4) - touchpad input driver
synclient (1) - commandline utility to query and modify Synaptics driver options.
Veja man synclient
:
synclient [-lV?] [var1=value1 [var2=value2] ...]
Para configurar o driver em xorg.conf
, consulte man synaptics
.