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Possible Duplicate:
How well do laptops with Nvidia Optimus work?

I am using NVIDIA GeForce GT 520M

default nvidia-current can only boot into Unity 2D, Unity fails to load.

I tried proprietary version (285) and it can't get into lightdm at all until I removed xorg.conf, even after that I can only get into Unity 2D as well.

Finally I tried the ubuntu-x-swat PPA and still, logging in with Unity only defaults back to Unity 2D.

With all 3 drivers running the /unity_support_test -p command gets me

Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Error: unable to create the OpenGL context

What can I do to get regular Unity running?

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I have the same card and had the same problem. While nvidia doesn't provide support for optimus technology, which this card has, on linux, I did get unity 3d to work by just uninstalling all nvidia drivers with:

sudo apt-get --purge remove nvidia*

After rebooting, I had fancy effects and all. I hope it works for you too.

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