How to uninstall cpad-kernel-source from Ubuntu
To uninstall just cpad-kernel-source package itself from Ubuntu execute on terminal:
sudo apt-get remove cpad-kernel-source
Uninstall cpad-kernel-source and it's dependent packages
To uninstall the cpad-kernel-source package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove cpad-kernel-source
If you also want to delete configuration and/or data files of cpad-kernel-source from Ubuntu then this will work:
sudo apt-get purge cpad-kernel-source
To delete configuration and/or data files of cpad-kernel-source and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge cpad-kernel-source
cpad-kernel-source package information
source for the Synaptics cPad driver
This package provides the source code for the cpad kernel module. The cpad driver will enable use of the middle button and ioctl's for the 1335 LCD controller in these units which are now found in some laptops. You'll need a kernel headers package or properly configured source for your running kernel to create the binary module package, and you'll require userspace tools to actually make it do much else.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.