[ubuntu] Alps pointing device

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http://ubuntuforums.org – I installed Ubuntu 11.04 on my Lenovo G555 laptop yesterday and I can't seem to get vertical scrolling on the touch pad to work. I browsed through the forums, but they give answers where I have no idea what to do. I'm a new user and don't know much about linux, and my brother is helping me to get up and started until I can learn more. If anyone can explain step-by-step & help me get vertical scrolling back, that would be much appreciated. Thanks in advance. (Hardware)