Set mouse acceleration

xset mouse 2.1 5

(acceleration 2.1, threshold 5px)


Set mouse speed/sensitivity

Find mouse id

xinput list

Genius USB Optical Mouse id=10 [slave pointer (2)]

Find speed/sensitivity property

xinput list-props 10|grep 'Constant Deceleration'

Device Accel Constant Deceleration (257): 2.500000

Set deceleration (speed/sensitivity)

xinput set-prop 10 257 2.5