xinput

http://www.x.org/releases/X11R7.5/doc/man/man1/xinput.1.html
http://legnaleurc.blogspot.com/2009/11/x-input-device-setting.html

$ xinput list




$ xinput list-props 2





$ xinput set-int-prop DEVICE PROPERTY FORMAT (8, 16, 32) VAL [VAL ...]