Ubuntu 14.04 no cursor after fresh instalation

I was having a similar problem after switching users. I was able to get the touch pad to work by reloading the kernel module:

sudo modprobe -r psmouse
sudo modprobe psmouse

I had a similar problem - after a kernel update, the display comes up fine and the cursor is invisible though it does work - I can move things around if I'm very careful.

This was solved by simply logging out and back in.