two fingers scroll?

[ludovico van <ludovicovan80@gmail.com>]

hi all,

i have a synaptics touchpad on a sony vaio sr11m laptop (how can i
know the exact touchpad model?), and i try to enable two finger scroll
with

$ xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics
Two-Finger Scrolling" 8 1 1
$

howewer it's not working. Is that enough?

how can i know if two fingers scrolling is supported on my laptop (debian sid)?

thanks all