How to enter system after Nvdia driver installation?

[Roger]

I usually install Fedora with the standard Nouveau driver and Ubuntu 
with it's video driver -  get the whole system functioning then install 
nvidia if and when required.
That process has never failed me.
Roger

>
> Hi, all,
>
> I got a HP env 5306tx laptop with dual GPUs, and I faild to install driver for it.
> I have tried official driver, rpmfusion, bumblebee, all failed.
> My dist is fc18-i386, with security boot disabled and legacy boot enabled.
>
> What is bothering me is that nvidia driver leave the screen blackout.
> When I reboot, I can dimly recognize a fedora logo in the center of screen, which is nearly blackout. So I cannot enter the system, and nothing changes after I add 3 at the end of grub command(and remove all these kernel options) or press ctrl-alt-fn.
>
>
> My questions is:
>    * Why nvidia driver affects run level 3 and TTY?
>    * How to enter system and remove installed drivers?
>    
> Another non-related question is TTY is not working properly before I install nvidia driver. If I boot in runlevel3, and I enter TTY2 before login,  the screen will flash between tty1 and tty2, or stick in tty2(cannot switch to other TTYs). I don't know it is a hardware problem or software problem.
>
> Any advice will be appreciated.
>
>