you first need to find out what "brand" it is.
Code:
cat /proc/bus/input/devices | grep -i TouchPad
or
cat /proc/bus/input/devices | grep -i name
find something to do with your touch pad. As this is a plugin device, it may not be initialized upon boot. Then one needs to figure out a way to cause it to be initialized and get discovered. It might be as easy as just moving your finger across it trying to activate it. big shot in the dark idea, mind you.