I had this problem with a Dell D600 upon upgrading to Intrepid. Adding the appropriate section to xorg.conf as mentioned by blue above fixed the problem for me.
-- Upgrade to Intrepid removes Synaptics touchpad vertical scrolling https://bugs.launchpad.net/bugs/278585 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs