O boy you are God sent what a relief !!! most people struggling with the XF86Config but forgot about the kxconfig. I finally got it right, I see that kxconfig will modify the XF86 config file, and by setting the default depth to 24 or more the screen looks great. But I am still wondering why my display card and LCD was detected properly during boot up, but it won't install and force to use standard VGA that's causes the problem.