[PPC] PowerBook G4 poor trackpad sensitivity

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http://ubuntuforums.org – Hey, I've installed Ubuntu 11.10 on my PowerBook G4 1.67ghz 15" (PowerBook5,8 ) and the trackpad has poor sensitivity/response with slow finger movement. For example, when I lightly move my finger the cursor initially stays put, then all-of-the-sudden starts a second later. It will not initially respond to an X direction movement if I'm going in the Y, and vice versa. (A weird effect of this is that the cursor will move in a square formation on screen if I lightly make a circular gesture on the trackpad). Fast movements work fine. But anything requiring precision (selecting text, a part (Hardware)