I just upgraded my netbook to Ubuntu 9.10 Karmic Koala. _place_holder; After the installation, two- finger _place_holder; vertical scrolling was not enabled. _place_holder; This was remedied by choosing “System”, “Preferences”, “Mouse”, and finally selecting the “Touchpad” tab. _place_holder; Once here, simply select the radio button for “Two- _f_inger scrolling”.