First I have installed Ubuntu 15.10 on my HP pavilion touchscreen laptop and my touch is working properly on that but now on 14.04.
What I have to do for this, in order to make my touchscreen working on Ubuntu 14.04.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.Sign up to join this community
You can install kernel from Ubuntu 15.10 that should support your touchscreen.
Run in terminal
sudo apt-get install linux-generic-lts-wily
and reboot when installation is finished.
You may need to install Broadcom wireless drivers from 15.10 source. Run
wget http://mirrors.kernel.org/ubuntu/pool/restricted/b/bcmwl/bcmwl-kernel-source_126.96.36.199+bdcom-0ubuntu7_amd64.deb sudo dpkg -i bcmwl-kernel-source_188.8.131.52+bdcom-0ubuntu7_amd64.deb