I'm trying to get work
auto-complete. I've installed the package from MELPA successfully. However, it just does not work. When I enable
auto-complete-mode the mode seems to be active (I see
AC in the list of minor modes), but there is no pop-up window displaying completions when I enter some text.
I thought that it should work out-of-box, but may be it's not the case. I cannot find instructions how to configure the package installed via package manager, not manually. What actions should I undertake?