bug when installing nvidia proprietary drivers

[Bullet]

I tried to install a proprietary driver nvidia on a acer aspire x1920 with a graphics card gt x 510 via the repository but that was wondering if the cd to install ubuntu to install it nimporte package via the repository

this manipulation that I can do to get out from the terminal

open my file for editing: gksudo gedit / etc / apt / sources.list

comment lines that were not with a (#) to: deb cdrom: [Lubuntu 12.04 _Precise Pangolin_ - Release i386 (20120423)] / multiverse restricted universe precise hand

knowing that when it happened to me I was under ubuntu 12.10 and not 12.04

is a member of the forum who helped me http://forum.ubuntu-fr.org/ from this page refesant in the same

after trying to install nvidia proprietary drivers when this operation is passed to me on restart computer I did not have access to or the start bar black which allows me to access the wifi system parameter ect

I think compiz bug