1

I need to optimize the speed of my point stick since I installed Xubuntu 18.04. When I run xinput list-props 15, here is what I get:

Device 'AlpsPS/2 ALPS DualPoint Stick':
Device Enabled (143):   1
Coordinate Transformation Matrix (145): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Natural Scrolling Enabled (280):   0
libinput Natural Scrolling Enabled Default (281):   0
libinput Scroll Methods Available (282):    0, 0, 1
libinput Scroll Method Enabled (283):   0, 0, 1
libinput Scroll Method Enabled Default (284):   0, 0, 1
libinput Button Scrolling Button (285): 2
libinput Button Scrolling Button Default (286): 2
libinput Middle Emulation Enabled (287):    0
libinput Middle Emulation Enabled Default (288):    0
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 (265): 1, 0
libinput Send Events Mode Enabled (266):    0, 0
libinput Send Events Mode Enabled Default (267):    0, 0
Device Node (268):  "/dev/input/event6"
Device Product ID (269):    2, 8
libinput Drag Lock Buttons (296):   <no items>
libinput Horizontal Scroll Enabled (297):   1

I don't see any prop that corresponds to the speed. Is there another solution to adapt the speed of point stick? Thank you in advance

Nenad Savić
  • 31
  • 2

1 Answers1

2

For my touchpad modifying the Coordinate Transformation Matrix helped, I set it to 2.400000, 0.000000, 0.000000, 0.000000, 2.400000, 0.000000, 0.000000, 0.000000, 1.000000 which sped up my pointer quite a bit.

Your command should read like this in the end:

input set-prop 15 145 \
2.400000, 0.000000, 0.000000, \
0.000000, 2.400000, 0.000000, \
0.000000, 0.000000, 1.000000

You can fiddle around with the two first values in the diagonal to adjust to your needs.

undko
  • 927
  • 8
  • 15
  • 1
    This works for me! Is it documented somewhere what these values represents? Seems like a three dimentional transformation matrix, but what's the third dimension for? EDIT: it seems to be a multiplier inversely proposal to the speed. So setting the last coordinate to 2 has the same effect as setting the x and y values to 0.5. – lindhe Sep 03 '18 at 12:17