[ubuntu] macbook 4.1 - Ubuntu 14.04. - make trackpad changes permanent

I seem to have a problem with my trackpad on Ubuntu 14.04.

My macbook 4.1 recognizes the trackpad on startup, but I have to use great pressure to move the cursor around.

The command line
does solve the problem, but after rebooting the machine I have to type in the command into the terminal every time.

How can I make changes permanent or is there a better way to fix the trackpad?

Thanks for any answers