I just had to apply that to my fresh install (a week or so old) of 14.04.1 to get FB to restart. Once the restart disappeared and when it reappeared it just logged me out with only the option of shutting down.

So, this is indeed the fix for making all the functions - restart, logout and shutdown work in Trusty 14.04 FB.

Code:
gsettings set com.canonical.indicator.session suppress-logout-restart-shutdown true