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One of my friends is using Ubuntu 12.10 Unity for some time. And finally he decided to try gnome shell. Hence he installed gnome shell and now while logging into gnome shell (from login screen) this weird thing occurs. Its falling back to old gnome. Tried restarting the laptop but still didnt work. He has Nvidia Gforce GT 540M graphic card. Didnt install any proprietary drivers. Tried disabling the graphic card in BIOS as well. Please help.


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Install a driver for nvidia using jocky-gtk – shantanu Dec 21 '12 at 7:10
@shantanu he will not see any extra driver in jocky-gtk as this is optimus enabled graphics card. – Web-E Dec 21 '12 at 7:53

540m is a optimus enabled graphics card.

Execute following

sudo rm /etc/X11/xorg.conf

Now reboot,the issue will be resolved.

To properly use this card see How well do laptops with Nvidia Optimus work?

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