If you mean you installed the .run from nvidia, then you need to run the installer again with --uninstall: ./nividia*.run --uninstall and then reinstall the xserver-xorg-core package since the nvidia installer removes the xserver libglx file.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in ubuntu. https://bugs.launchpad.net/bugs/643895 Title: nvidia propietary driver fails to load X with geforce 310M _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp