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When I run xinput list-props 12 (12 is the id for 'Touchpad'), I get the following:

Device Enabled (145):   1
    Coordinate Transformation Matrix (147): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    libinput Natural Scrolling Enabled (282):   0
    libinput Natural Scrolling Enabled Default (283):   0
    libinput Scroll Methods Available (284):    0, 0, 1
    libinput Scroll Method Enabled (285):   0, 0, 1
    libinput Scroll Method Enabled Default (286):   0, 0, 1
    libinput Button Scrolling Button (287): 3
    libinput Button Scrolling Button Default (288): 3
    libinput Accel Speed (289): 0.000000
    libinput Accel Speed Default (290): 0.000000
    libinput Accel Profiles Available (291):    1, 1
    libinput Accel Profile Enabled (292):   1, 0
    libinput Accel Profile Enabled Default (293):   1, 0
    libinput Left Handed Enabled (294): 0
    libinput Left Handed Enabled Default (295): 0
    libinput Send Events Modes Available (267): 1, 0
    libinput Send Events Mode Enabled (268):    0, 0
    libinput Send Events Mode Enabled Default (269):    0, 0
    libinput Drag Lock Buttons (296):   <no items>
    libinput Horizontal Scroll Enabled (297):   1

I have ran xinput --set-prop 12 'libunput Accel Speed' 0.1 to change its acceleration, but that isn't quite what I want - I want to adjust the touchpad's speed.

I am not being show the property ID for Device Accel Constant Deceleration, which is what I would like to change following the comments on this question.

Is there something something else I can do to adjust the touchpad speed, not the acceleration?

Jake Jackson
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1 Answers1

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the setting you are looking for is the Coordinate Transformation Matrix

You can use the default Value 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000

and change the last value. You can do it like this:

ctmVal=3
xinput set-prop 12 "Coordinate Transformation Matrix" 1, 0, 0, 0, 1, 0, 0, 0, $ctmVal

the higher $ctmVal in this case, the slower the mouse speed

mountainer
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