It would be helpful if you said the error you were getting in Ubuntu for apt-get?
You did follow steps 2 and 3 here correctly right? http://liliputing.com/2011/08/how-to-install-ubuntu-linux-on-an-hp-touchpad.html
You did follow steps 2 and 3 here correctly right? http://liliputing.com/2011/08/how-to-install-ubuntu-linux-on-an-hp-touchpad.html