I'm using ubuntu (and compiz, though I'm not sure it's relevant) and I've been wondering something : how to display the desktop, as you would in windows using windows key+D ?
In system-> preferences-> keyboard shortcuts there's an action called "hide all normal windows and set focus to the desktop".
What does "normal windows" mean ?
When I press this shortcut (which seems to have the same effect as if you press the bottom left corner), the desktop is displayed, but there are some small squares in the corners that seem to be pieces of windows. What are these exactly, and if they're not useful, how can I make them disappear ?
Plus, if I press this shortcut twice, all windows disappear from the bottom panel (I don't know the proper name). Is that a bug ?