Hi all, in fact the easy way it's the DP to VGA adapter (order code S26391-F6055-L280). You could find close adapters from other vendors and they surely will work fine saving just a few euros. I've tried to find a cheaper DVI-D to VGA adapter but haven't found a good solution. I have even tried DVI-D to DVI-I converters and then DVI-I to VGA but doesn't seems to work fine and you really save a couple of euros. The main point it's that DVI-I combines digital and analog signals so its easy to switch to VGA which it's just analog. DVI-D, instead, it's just digital so it should need some more complex adapters. The question it's that, that's done with DP but none seems to have done with DVI-D Anyway, try DP-to-VGA they are quite easy to find.
frankly, using a 5-10€ dp-vga adapter makes more sense then buying an 30€ addin card. knowing that dvi-d does not easily suport a conversion vga, i was concerned that dp to vga might have the same problem. glad to hear that isn´t the case.