I have NB with hd 4000 and nvidia gt650 ... nad i have problem with external display (LG l245wp)
problem exactly like old problem here .
this monitor was connected to my PC during last 5 years and i have not such problem...
on intel card
1) image is cropped and off-centered
2) most Menu on LG is disabled (i even cant change color space)
Also i forget about second problem
when i connect NB to TV - the image is over-scaled by default