This bug effects me with 12.04 fresh install on a ThinkPad T420s. Comment #46 works around the issue nicely (Fn-F8 toggles touchpad on and off properly) until the next reboot:
sudo xinput set-int-prop 11 "Synaptics Off" 8 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/804109 Title: can't enable touchpad in Ubuntu 11.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/804109/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs