Comment 29 for bug 814833

i've narrowed it down to this:

- when i have no window, or a non-maximized window open (any app):
 opening the Dash or Hud works slow and choppy, but it works. they close, and the Launcher comes back too.

- when I have a maximized window open (any app):
opening the Dash or Hud takes several seconds, they don't respond to typing and they won't close, or take incredibly long. when they do manage to close, the Launcher will not come back...

unless:
when it all gets stuck, i switch to a terminal using CTRL+ALT+[F1 to 6] wait a second and switch back with CTRL+ALT+F7, Unity has caught up to where it should be.

Conclusion: I think it has something to do with rendering unity while a window is maximized.

 I have no clue why it matters to have a window maximized or not.