I have a problem with my Galaxy Nexus before and now my LG Nexus 4 - they keep pop up the nautilus if I insert the plug to the cable (I prefer charging my phone to the laptop).
So here is the solution, which finally I found from here
Go to your terminal, type dconf-editor. The find "org.gnome.desktop.media-handling.automount-open"
And choose your preferred choice, mine is like this:
As I prefer the phone being automounted, I just feel annoyed with the nautilus pop up, hence I untick "automount-open" but choose "automount" and "autorun-never" instead.
I feel the autorun function is so Windowish.. and wondering why it ever exists. Not that it is bad.. but for me it is less preferred.