unmet dependencies for synaptics touchpad driver

Solution 1:

A good way to solve these problems is to use aptitude.

sudo apt-get install aptitude
sudo aptitude update
sudo aptitude install xserver-xorg-input-synaptics

Now several ways to solve the problem will be proposed by aptitude:

Choose the solution that uninstalls the least packets. Write down what packages are removed. Install the packages again if needed.