Ubuntu has impressive graphical effects. But while running inside virutalbox i was little upset that ubuntu can’t detect any graphics hardware inside virtualbox. I was just thinking how can i enable those nice effects in ubuntu while running inside virtualbox. I was searching in google and i endup with a solution, here i am sharing it.
step1: after logging in ubuntu press alt+f2 (it will open a run application popup)
step2: type gconf-editor in there (it will open configuration editor).
step3: in configuration editor find app->metacity->general->compositing_manager (mark compositing manager checked and it will enable the shadow effect)