From the first time installing Ubuntu, I can not enable desktop effects. My laptop is Asus K53SV core i7 SB with hybrid graphic card Intel HD 3000/ Nvidia 540 GM. After installing Bumblebee, I still can't enable it. I've found these links: http://intellinuxgraphics.org/download.html and http://intellinuxgraphics.org/2011Q1.html which said "This release has been validated on following hardware: Sandy Bridge HD Graphics 3000 Core i7 2630QM" How could I reinstall Intel onboard driver this way? I need details. If there is another, how to do that?