I am using a USB Mouse with scrolling middle wheel (model "trust"). The issue is when I use the scroll wheel it moves a bit in the opposite direction before scrolling in the expected direction (I suppose it is a kind of animation to feel more "natural" the movement, but is very annoying..) I checked with xinput, and can't find a parameter to fix that:
xinput list
USB Optical Mouse id=19 [slave pointer (2)]
then:
~ : xinput list-props 19
Device 'USB Optical Mouse':
Device Enabled (169): 1
Coordinate Transformation Matrix (171): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Natural Scrolling Enabled (305): 0
libinput Natural Scrolling Enabled Default (306): 0
libinput Scroll Methods Available (319): 0, 0, 1
libinput Scroll Method Enabled (320): 0, 0, 0
libinput Scroll Method Enabled Default (321): 0, 0, 0
libinput Button Scrolling Button (565): 2
libinput Button Scrolling Button Default (566): 2
libinput Middle Emulation Enabled (567): 0
libinput Middle Emulation Enabled Default (568): 0
libinput Accel Speed (322): -0.735294
libinput Accel Speed Default (323): 0.000000
libinput Accel Profiles Available (569): 1, 1
libinput Accel Profile Enabled (570): 1, 0
libinput Accel Profile Enabled Default (571): 1, 0
libinput Left Handed Enabled (324): 0
libinput Left Handed Enabled Default (325): 0
libinput Send Events Modes Available (290): 1, 0
libinput Send Events Mode Enabled (291): 0, 0
libinput Send Events Mode Enabled Default (292): 0, 0
Device Node (293): "/dev/input/event22"
Device Product ID (294): 7119, 5
libinput Drag Lock Buttons (307): <no items>
libinput Horizontal Scroll Enabled (308): 1
I tried with Accel Speed (322) but zeroing just set cursor to max speed, not related to wheel.
How can I disable that little jump in the opposite direction when scrolling, and if possible, smooth the scrolling effect?
