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I manually installed the lastest Nvidia drivers on Ubuntu 12.10 using the files directly from the Nvidia website. Long story short, they don't work, I have an extremely low resolution, and need to go back to nouveau. I can get to the terminal by re-logging in after holding down Ctrl-Alt-F1, how do I purge the proprietary drivers and go back to nouveau?

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Have you tried the Nvidia drivers available from the restricted repository? – fabricator4 Oct 28 '12 at 5:46

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Navigate to the directory you downloaded the .run from, then do:

sudo ./NVIDIA-Linux-x86_64-304.60.run --uninstall

If you have a different version, obviously, change the name. Now do:

sudo apt-get install xserver-xorg-video-nouveau
sudo rm /etc/X11/xorg.conf

That last rm might fail; if it does, don't worry about it. It's just to ensure that if Nvidia installed a custom xorg.conf, you got it out of there.

Finally,

sudo reboot

EDIT: Whoops, didn't see the "from the Nvidia website." Fixed.

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Thanks, the resolutions fixed but the unity bar is gone – Stacks Oct 28 '12 at 16:04
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I had something like that. I found that gnome worked (in a 2D mode) and that by installing xserver-xorg-video-nouveau unity worked again. – philcolbourn Nov 3 '12 at 13:55

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