> I've not yet met a system using Intel graphics
> which doesn't need the screen resolution to be
> set manually in xorg.conf.
On all 4 laptops that I own or administrate, none needs an xorg.conf; and all of them use intel graphics (and 3 different generations of intel graphics).
On boot, the kernel detects the correct screen resolution for the panels and automatically sets the correct mode. When plugging in a screen, the screen is detected, and the correct mode is set automatically.