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.

  
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