[ubuntu] Lost the Ubuntu 3D login option (Ubuntu 12.04)

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http://ubuntuforums.org – Hi guys, I have lost the Ubuntu 3D login option (the one that appears on the splash screen). What happened: I installed compiz and the compiz settings manager. I could didn't find it useful so I removed all the compiz packages. After logging out I now only have the 2D login option. I reinstalled compiz and the OpenGL compiz package to no avail. Any suggestions on how to get the 3D login back? I´d hate to reinstall the whole system... Thanks in advance! (Hardware)