The hardware compatibility list for FreeBSD 8.3, 8.4, 9.0 and 10.0 (and possibly others) does not state that FreeBSD supports the Intel i350 series cards, while the release notes for 8.3 and 9.0 state support was added in r230848 and r218530 respectively. HCL 8.3: http://www.freebsd.org/releases/8.3R/hardware.html HCL 8.4: http://www.freebsd.org/releases/8.4R/hardware.html HCL 9.0: http://www.freebsd.org/releases/9.0R/hardware.html HCL 10.0: http://www.freebsd.org/releases/10.0R/hardware.html RelNotes 8.3: http://www.freebsd.org/releases/8.3R/relnotes-detailed.html RelNotes 9.0: http://www.freebsd.org/releases/9.0R/relnotes-detailed.html
This is not fixable for prior releases, but is fixable for the upcoming 10.1-R and future releases.
A commit references this bug: Author: gavin Date: Thu Oct 16 23:07:09 UTC 2014 New revision: 273197 URL: https://svnweb.freebsd.org/changeset/base/273197 Log: The igb(4) driver supports 82580, i350, i354, i210 and i211 chipsets too, document them. PR: 192301 MFC after: 1 week Changes: head/share/man/man4/igb.4
Thanks for your contribution, I've fixed this in head and will merge in the coming week. I may have been too late to get this in in time for 10.1, unfortunately.