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I've installed nVidia driver successfully but I want to go back to Nouveau driver and eliminate any xorg.conf file created by nVidia config tools.

What is the proper way to do it? (not ending up with no driver at all, or no X server)

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3 Answers

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If you installed using the recommended procedure through System -> Administration -> Hardware Drivers or Additional Drivers, simply go back there and click the driver in use to hilite it, click "Remove". this will safely remove the nVidia driver in use and allow Nouveau to take it's place. You can, if desired, remove the /etc/X11/xorg.conf manually before restarting the computer.

The driver in use is normally the one with the green button on the left.

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What if the GUI refuses to start? What is the CLI command to do this? (on my GT 425M, only the console was accessible after a reboot with the properitary drivers from ) – Lekensteyn Jan 6 '11 at 13:49
If that happens, boot to the recovery menu, and remove or rename /etc/X11/xorg.conf. This file does prevent the gui from starting on some systems. – charlie-tca Jan 16 '11 at 18:46
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up vote 3 down vote

To reconfigure xorg.conf, type the following command:

sudo dpkg-reconfigure xserver-xorg

Go following the screen steps, answering the wizard questions and you should able to restore or reconfigure to previous Nouveau state.

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Just in case of troubleshooting. https://wiki.ubuntu.com/X/Troubleshooting/NvidiaDriverSwitching

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