Hola,

>    The problem is after running for first time (after each boot) X, I
> cant use the text consoles anymore cause they're so dark.

This is a known problem with the radeon driver. The version booked with 
NetBSD's X11R6 seems to be patched and works. I've the same problem on 
my laptop.

Simply wait for a new release or try to import NetBSD's radeon driver 
(which I did not do, I admit !)

Hasta la proxima
Vincent