Let me start off by saying that I've already read this post. The autocomplete window occasionally shows up, but sometimes it doesn't like when I try to get a list of available methods for an object. Here is an example:
As you can see, when I type in some code nothing happens:
But when I press control+space, the available methods show up:
Here are my relevant User settings:
{
"auto_complete": true,
"auto_complete_commit_on_tab": true,
"auto_complete_selector": "source, text"
}