[Bug 288827] 14.2 -> 14.3 - igb interface reports "no media" when forced to 100M full-duplex

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=288827

--- Comment #4 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=3ff0231c87f360afa4521e635b46f6c711dc4ee3

commit 3ff0231c87f360afa4521e635b46f6c711dc4ee3
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2025-08-19 16:45:48 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2025-08-19 16:51:00 +0000

    Revert "e1000: Try auto-negotiation for fixed 100 or 10 configuration"

    We've gotten a report of this breaking a fixed no autoneg setup.

    Since no link is worse than what this intends to fix (negotiating full
    duplex at forced speed), revert for the undeway 15.0 release cycle
    until this can be further reviewed.

    PR:             288827
    MFC after:      3 days
    Differential Revision:  https://reviews.freebsd.org/D47336

    This reverts commit 645c45e297c0fcbbb9d2d24cdeeb124234825019.

 sys/dev/e1000/e1000_phy.c |  5 ++---
 sys/dev/e1000/if_em.c     | 44 ++++++--------------------------------------
 2 files changed, 8 insertions(+), 41 deletions(-)

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