what i need is to enable the lamest hardware acceleration to get gnome-shell or unity 3d working.

• i know about bumblebee/ironhide/bumblebee-project. but i didn't
  understand how to use it directly with x11 server to enable the use
  of those advanced environment.


• i don't care about what card will give me gnome-shell/unity3d working. i wonder if there is a way to use only intel (but accellerated!)


• i really don't care about power save

i'm tired to be reverted to gnome-session-fallback or unity 2d.

please tell me if there is a way or if i will be stuck with gnome 2.* until i'll buy another laptop.