[ubuntu] Missing trackpad tab in Mouse Preferences

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http://ubuntuforums.org – I have an Acer Aspire 5738, with Ubuntu 9.10. When I go to the Mouse preferences window, there is a General tab, and an accesibility tab, but no trackpad tab. I know there should be one based on using Karmic on different laptops. So, anyone know how to get my beloved trackpad back? If it helps, I put i8042.nomux in my GRUB_CMDLINE_LINUX_DEFAULT to fix the problem with the trackpad disable button. Any help would be appreciated. (Hardware)