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OK, so I know that other people asked exactly the same... but I just moved from Nouveau to Nvidia using this tutorial, and the new drivers are really, really, really slow. How can I remove Nvidia drivers and recover the open ones?

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marked as duplicate by bain, Warren Hill, karel, Eric Carvalho, Rinzwind 18 hours ago

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2 Answers 2

I had a similar problem. Solved like this:

  1. Boot as normal and get to login screen

  2. press Ctrl+Alt+F1

  3. Login with your username and password.

  4. type sudo stop lightdm and press Enter, stops X11

  5. type sudo apt-get purge nvidia* and press Enter - clears all nvidia items

  6. type sudo apt-get install xserver-xorg-video-nouveau and press Enter - will install this package or tell you if it is already there.

  7. type sudo reboot

This got me back up and running (although no icons in Unity Launcher - since need correct graphic drivers) check system settings to search for Additional drivers to see if this can be addressed - although adding wrong drivers may cause the system to be faulty or freeze after login.

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up vote 0 down vote accepted
  1. If you added things to the blacklist, remove them now from the list with sudo gedit /etc/modprobe.d/blacklist.conf
  2. Now close your session and press Ctrl + Alt + F1 in the login menu.
  3. Login with your username and password.
  4. Run sudo stop lightdm, which will stop X11 (including the standard login menu!)
  5. Now exec sudo nvidia-uninstall
  6. Press Yes to restore from a backup.
  7. You may find errors related with non-empty folders. Ignore them.
  8. If you removed Nouveau, run sudo apt-get install xserver-xorg-video-nouveau
  9. Now you can finish with sudo reboot
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The question is about restoring the open graphics drivers (Nouveau), not about installing nvidia-current. Additionally, sudo stop lightdm won't work. I think you mean sudo service lightdm stop. –  gertvdijk Sep 16 '12 at 12:55
    
1) Isn't nvidia-current the same as Noveau? –  espectalll123 Sep 16 '12 at 13:41
    
2) This is my question AND my answer, so I tested myself the instructions :P –  espectalll123 Sep 16 '12 at 13:42
2  
Nouveau is provided by xserver-xorg-video-nouveau. nvidia-current will blacklist nouveau in /etc/modprobe.d/nvidia-graphics-drivers.conf. –  gertvdijk Sep 16 '12 at 13:45
    
OK, thanks, @gertvdijk –  espectalll123 Sep 16 '12 at 14:00

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