[ubuntu] Touchpad Scroll Gesture

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http://ubuntuforums.org – I have a keyboard with a built-in touchpad that I often use with my laptop, but while the laptop's built-in touchpad does support scrolling by stroking the right-hand edge of the touchpad, the touchpad on the external keyboard does not. Is there any way to add this functionality? Or better yet, is there any way to emulate the two-finger scrolling (vertical and horizontal) as on the Mac? (Hardware)