After installing xf86-input-synaptics, a default configuration file is located at /usr/share/X11//nf. The primary method of configuration for the touchpad is through an Xorg server configuration file. The Synaptics driver can be installed with the package xf86-input-synaptics.
4.13 Xorg.log.0 shows SynPS/2 Synaptics touchpad can not grab event device, errno=16.4.10 Scrolling and multiple actions with Synaptics on LG laptops.4.8 Firefox and special touchpad events.
