Alter Dell laptop trackpoint sensitivity under Linux:
xinput list
xinput list-props 13
xinput set-prop 13 269 1.0
xinput set-prop 13 269 0.8
xinput set-prop 13 269 0.5
xinput set-prop 13 269 0.1
xinput set-prop 13 268 0.5
xinput set-prop 13 268 0.9
xinput list-props 13
xinput set-prop 13 267 0.9
xinput set-prop 13 267 0.1
xinput set-prop 13 267 2.0
xinput set-prop 13 268 2.0
xinput set-prop 13 268 1.0
xinput set-prop 13 269 0.05
xinput set-prop 13 267 3.0
xinput set-prop 13 267 5.0
xinput set-prop 13 268 2.0
xinput set-prop 13 268 1.5
xinput set-prop 13 267 1.0
xinput set-prop 13 267 2.0
xinput set-prop 13 267 3.0
xinput set-prop 13 267 4.0
xinput set-prop 13 268 2.0
xinput list-props 13
xinput set-prop 13 267 2.5
xinput set-prop 13 268 1.0
xinput set-prop 13 269 12.5
xinput set-prop 13 267 5.0
xinput set-prop 13 267 7.0
xinput set-prop 13 268 2.0
xinput set-prop 13 267 10.0
xinput set-prop 13 268 3.0
xinput set-prop 13 268 5.0
xinput set-prop 13 267 15.0
xinput set-prop 13 267 12.0
xinput set-prop 13 267 11.0
# $ xinput list-props 13
# Device 'AlpsPS/2 ALPS DualPoint Stick':
# Device Enabled (140): 1
# Coordinate Transformation Matrix (142): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
# Device Accel Profile (266): 0
# Device Accel Constant Deceleration (267): 11.000000
# Device Accel Adaptive Deceleration (268): 5.000000
# Device Accel Velocity Scaling (269): 12.500000
# Device Product ID (261): 2, 8
# Device Node (262): "/dev/input/event6"
# Evdev Axis Inversion (305): 0, 0
# Evdev Axes Swap (307): 0
# Axis Labels (308): "Rel X" (150), "Rel Y" (151)
# Button Labels (309): "Button Left" (143), "Button Middle" (144), "Button Right" (145), "Button Wheel Up" (146), "Button Wheel Down" (147), "Button Horiz Wheel Left" (148), "Button Horiz Wheel Right" (149)
# Evdev Scrolling Distance (310): 0, 0, 0
# Evdev Middle Button Emulation (311): 1
# Evdev Middle Button Timeout (312): 50
# Evdev Third Button Emulation (313): 0
# Evdev Third Button Emulation Timeout (314): 1000
# Evdev Third Button Emulation Button (315): 3
# Evdev Third Button Emulation Threshold (316): 20
# Evdev Wheel Emulation (317): 1
# Evdev Wheel Emulation Axes (318): 6, 7, 4, 5
# Evdev Wheel Emulation Inertia (319): 10
# Evdev Wheel Emulation Timeout (320): 200
# Evdev Wheel Emulation Button (321): 2
# Evdev Drag Lock Buttons (322): 0