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Date:      Sun, 12 Nov 2023 16:12:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 274926] Problem with netwokr card, and when restart network, crash system
Message-ID:  <bug-274926-7501-ARWXpPW3cS@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-274926-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-274926-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D274926

--- Comment #8 from Olivier Cochard <olivier@freebsd.org> ---
To sum up, there are 2 problems here:
1). The root cause:=C2=A0After network cable disconnect, the negotiated spe=
ed is 10
Mbps in place of 1Gbps.

Notice there are multiple reports of this same 10Mbps negotiation bug (after
sleep or disconnection) on Linux with same chipset. Power management seems =
to
be the culprit on Linux:
https://bugzilla.redhat.com/show_bug.cgi?id=3D1627816

And the Linux patches that solved it are:

e1000e: PCIm function state support:
https://lkml.kernel.org/netdev/20190628224932.3389-16-jeffrey.t.kirsher@int=
el.com/

e1000e: Make speed detection on hotplugging cable more reliable
https://lkml.kernel.org/netdev/309B89C4C689E141A5FF6A0C5FB2118B970D75A2@ORS=
MSX103.amr.corp.intel.com/T/


2). The second bug with netif restart that trigger a panic, and the text
version of the core dump is requested to get more clue about this one.

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