[Intel-gfx] Meaning of "fbpercrtc=1" option?

[Marc Deop i Argemí]

On Wednesday 07 October 2009 10:14:37 Tobias Hain wrote:
> I resolved both issues by booting with "fbpercrtc=1" option, which I found
>  in  the source code. It boots fine with a huge 1920 x 1200 console only on
>  the external screen and switching between X and console leaves the
>  internal LVDS turned off. That's the way I want to use it.
> 

That's what I've been looking for some time although... it does not work for 
me :S

Any other way to set the external display to its maximum res(1920x1080?

Thanks!