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I installed Bumblebee to solve Nvidia/Intel driver problem. It does work well, but it also disabled Unity 3D.

How can I get my Unity 3D back?

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did you installed anything like ironhide before. have you installed bumblebee from here ? bumblebee-project.org/install.html#Ubuntu –  Web-E Jun 28 '12 at 15:00
    
Make sure you don't have nvidia-common installed. The only nvidia packages that should be installed are nvidia-current and bumblebee-nvidia –  Ian B. Aug 14 '12 at 18:26
    
Ian B. when uninstalling nvidia-common, synaptic also wants to un-install the ubuntu-desktop-system. Are you sure this is wise? –  user2413 Aug 20 '12 at 14:30

3 Answers 3

Bumblebee is pretty unstable right now, especially in 12.04.

Nvidia drivers a pretty solid, even if they aren't open sourced. I recommend sticking to the official driver. I installed Bumblebee on a 9800GT and it took out my whole xserver.

use

sudo apt-get autoremove --purge bumblebee bumblebee-nvidia nvidia-current

and download the official driver from nvidia: http://www.nvidia.com/Download/index.aspx?lang=en-us

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After your computer is up an running, logout of your current session. On the login screen there is a little icon you need to click (near the user name). From the icon menu, you should be able select Unity 3D, or any other installed desktops.

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You should uninstall bumblebee, bumblebee-nvidia and nvidia-current.

sudo apt-get autoremove --purge bumblebee bumblebee-nvidia nvidia-current

It should not be necessary to uninstall nvidia-common nor ubuntu-desktop-system.

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