the exit, minimize, and window size buttons are gone (for ubuntu main programs) in the top left of screen and the entire black bar with the buttons when in windowed mode is gone.
1 Answer
Make sure Compiz is decorating the windows.
1) Install Compiz Settings Manager,
2) Open ccsm (Alt + F2 and type ccsm
and hit Enter)
3) Got to "Effects" and check "Window Decoration":