Fedora – Disable device with libinput

Libinput does not have any kind of "for every wheel scroll, do n lines/degrees" concept as a common party, the setting seems to be device-specific for now, as some Logitech has the parameter Evdev Scrolling Distance (278) that possibly came with the "old" Evdev driver includes.

This will be considered an regression for the user experience on my opinion, where at first, the inclusion of a configurable mouse scroll sensitivity into the common toolkit (libinput), was refused, it is now part of a pull request to be in future versions – possibly the function calls will have to be implemented in every Desktop Environment.

There are many possibilities to fix such issue, but depends on the Linux distribution.

1. Be lucky and have driver-specific scroll sensitivity – check by doing a search for all inputs with scroll variables:

   xinput list | cut -f2 | cut -f2 -d'=' | \
               xargs -d $'\n' -I'{}' sh -c "xinput list-props '{}' | grep -iq scroll  &&  \
                                       (echo Listing dev id '{}'; xinput list-props '{}')"

   and setting the specific variable by xinput --set-prop <ID> <SUB-ID> <values>, where <ID> can be the device name and <SUB-ID> can be the setting name.

2. A general fix is repatching the libinput code and rebuilding.

3. You can try to rollback to udevadm/evdev interfaces with X11, and then try the X11 variable MOUSE_WHEEL_CLICK_ANGLE.

4. From reference of last item, its possible to use imwheel to emulate mouse scroll clicks in multiply value.

   # Should use imwheel --kill --buttons "4 5" to restart imwheel,
   # if the mouse has back/forward buttons, otherwhise imwheel --kill is enough.
   # imwheel must be set to autostart in your DE tools.
   #Edit ~/.imwheelrc to include, where '3' is a multiplier
   ".*"
   None,      Up,   Button4, 3
   None,      Down, Button5, 3
   Control_L, Up,   Control_L|Button4
   Control_L, Down, Control_L|Button5
   Shift_L,   Up,   Shift_L|Button4
   Shift_L,   Down, Shift_L|Button5
   

5. There are specific application settings for mouse wheel sensitivity, like Chrome SmoothScroll and Firefox SmoothWheel ref.

Not a solution based on libinput-gestures, but I founnd that fusuma has settings for threshold and interval.

Right now my config is like

pinch:
  in:
    shortcut: 'ctrl+shift+plus'
  out:
    shortcut: 'ctrl+minus'

threshold:
  swipe: 0.5
  pinch: 0.2

interval:
  swipe: 1 
  pinch: 0.2

However the zoom in gesture is hardly detected, I have to use three fingers to make sure it is not locked as a swipe up/down.