Tested on FreeBSD 11.1-RELEASE.
On FreeBSD 11.1:
Xorg does not work with the intel driver form xf86-video-intel. The machine becomes unresponsive.
It might be related to the fact that loading i915_kms results in an unresponsive black screen as well.
Xorg does not work with SCFB, which is picked up automatically. It turns out to be problematic if you want to install xorg instead of xorg-minimal.