CURRENT and HD3000: i915 failing badly

Hello out there,

I got my hands on a Fujitsu Lifebook E751 manufactured 8/2011. The CPU is
a Core i5-2520M, 4GB RAM and QM67 chipset, with an integrated HD3000 graphics.
The display is on this model a Non-Glare HD+ display (1920x1080, I guess).

Neither FreeBSD 11.1-RELENG from USB flash nor 12-CURRENT as of 25th January
work with the display: after the kernel has booted, I see only distortion and
garbage on the screen. I checked with a recent Ubuntu and the Linux system is
capable of showing nice and fancy graphics - but FreeBSD seems to be incapable
to produce any serious console picture on this 6+ years old HD3000 chipset.
What is the special case on this HD3000 and why isn't FreeBSD supporting it
properly - or am I doing something wrong?

Kind regards,
oh