No, that's not necessary.
Does it help if you type the following command and try (vertical) multi-finger scrolling?
xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 8 1 0
No, that's not necessary.
Does it help if you type the following command and try (vertical) multi-finger scrolling?
xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 8 1 0