> Anyone a hint? What is he doing by testing ifmedia_set ?

It does not find the media interface in your ethernet board.
Is it a PCI card or on board ethernet? If it's a PCI card, try to get
another.

If it's on-board, you can try a -current snapshot, maybe it will work
better. If it still fails, then you should open a problem report.

-- 
Emmanuel Dreyfus
p99dreyf@criens.u-psud.fr