mark@mark-Inspiron-3847:~ $ xinput --query-state 8
2 classes :
ButtonClass
	button[1]=up
	button[2]=up
	button[3]=up
	button[4]=up
	button[5]=up
	button[6]=up
	button[7]=up
	button[8]=up
	button[9]=up
	button[10]=up
	button[11]=up
	button[12]=up
	button[13]=up
	button[14]=up
	button[15]=up
	button[16]=up
ValuatorClass Mode=Relative Proximity=In
	valuator[0]=748
	valuator[1]=269
	valuator[2]=-1647
mark@mark-Inspiron-3847:~ $