Comment 12 for bug 123205

See this bug in Hardy Alpha 5 (with an intel GMA X3100).
As a workaround, if you doesn't use the internal display of your laptop, you can switch of the internal with an xrandr command (xrandr --output LVDS --off) and restart compiz. After that compiz works fine when maximizing. It also shows that Compiz doesn't use the internal display resolution if the internal display is turned off : Maybe Compiz uses the resolution of the first screen it found ?