Enable MouseWheel emulation

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Hello, Great tip! After struggling to get a start on actually understanding about X's handling of my breed of rodent's buttons and scrolling; You got me pointed in the right direction. I now understand about using xinput to set the evdev options for my aged (but very comfortable) Logitech Trackman Marble FX (PS/2 interface) trackball!

One helpful addition to the thread; Use xev to find out the assignment of the button's numbers on a device. Mine are 1 2 3 8 (certainly not what I would have expected).

Do you use trackballs or your mouse doesn't have wheels ? Do you want to map wheel like features with any other mouse button ?

For any wheel related emulation you can use "Evdev Wheel Emulation" property and set its value for your respective mouse via xinput. Playing with few parameters from the command -

# xinput --list-props "Device Name"

Evdev Wheel Emulation (281):    0
Evdev Wheel Emulation Axes (282):   0, 0, 4, 5
Evdev Wheel Emulation Inertia (283):    10
Evdev Wheel Emulation Timeout (284):    200
Evdev Wheel Emulation Button (285): 4

Normally the wheel button events are 4 and 5. Check more details with -

$ man evdev

To find your device ID or NAME:

xinput --list --short

then apply this:

xinput --set-prop 11 "Evdev Wheel Emulation" 1

where 11 is the id of your mouse from the command above. There are few more parameters you can set:

xinput --list-props 11

Hello, Great tip! After struggling to get a start on actually understanding about X's handling of my breed of rodent's buttons and scrolling; You got me pointed in the right direction. I now understand about using xinput to set the evdev options for my aged (but very comfortable) Logitech Trackman Marble FX (PS/2 interface) trackball!

One helpful addition to the thread; Use xev to find out the assignment of the button's numbers on a device. Mine are 1 2 3 8 (certainly not what I would have expected).