igb(4) media status incorrect when disconnected

[Nick Rogers]

Hello,

In 12.0-RELEASE, STABLE, and 13-CURRENT,  gb(4) interfaces report an
incorrect media status after they are disconnected (ethernet cable
unplugged). Ifconfig reports active + autoselect/1000baseT when it should
report inactive.

I filed a bug for this a few weeks ago and have not had any luck...
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236724

I am wondering if anyone in this list has any ideas or can help me begin to
pinpoint where things are breaking down. My current thought is either the
driver does not receive the interrupt when its unplugged, or something else
is wrong, but I am unsure how to verify this. An ifconfig down + up always
resolves it (corrects the status).

Thank you.