title: Intellij Idea Code Completion not working
body: <p>I just started Intellij Idea ( version 13.1.4 )today and noticed code completion with ctrl + space doesnt work anymore. 
  If i'm typing like a class the automatic popup still appears and i can autocomplete this way, but if i close the popup with esc i cannot open it with ctrl + space anymore.</p>
  
  <p>My settings: </p>
  
  <p><img src="https://i.stack.imgur.com/794cz.png" alt="enter image description here"></p>
  
  <p>So Basic Completion is activated. 
  I tryed:</p>
  
  <ul>
  <li><p>file-> invalid caches and restart</p></li>
  <li><p>power mode off and one </p></li>
  </ul>
  
  <p>No difference. Any help appreciated cause it kinda makes me mad :)</p>