How to enable Two finger scrolling on Lenovo Thinkpad T400/W540

It is disabled (greyed out) in Mouse and Touchpad settings. Edge scrolling works though :) Tried many solutions available online but couldn't succeed.

My touchpad is

SynPS/2 Synaptics TouchPad

It can be enabled also using commands:

xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 4
xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Width" 8
xinput --set-prop --type=int --format=8  "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 1 0

This was tested on Lenovo T410, T430, and T430s.