I have found that I am not the only one experiencing trouble when trying to install xserver-xorg-input-synaptics ...
See for example the following link:
http://askubuntu.com/questions/623040/synaptics-touchpad-missing-in-ubuntu-14-04-2-with-dell-5550
I have found that I am not the only one experiencing trouble when trying to install xorg-input- synaptics ...
xserver-
See for example the following link:
http:// askubuntu. com/questions/ 623040/ synaptics- touchpad- missing- in-ubuntu- 14-04-2- with-dell- 5550