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Date:      Wed, 28 Apr 2021 14:22:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        wireless@FreeBSD.org
Subject:   [Bug 255465] Kernel panic with Intel Wireless 4965AGN chip
Message-ID:  <bug-255465-21060@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255465

            Bug ID: 255465
           Summary: Kernel panic with Intel Wireless 4965AGN chip
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: radoslaw.chmielarz@emersi.eu

Hi,

After attaching Intel Wireless WiFi Link 4965AGN through PCIe slot I have
experienced a kernel panic on startup with stack trace pointing to
ieee80211_chan_init() originating from iwn_attach(). Probably the kernel is
pointing at a more precise piece of code but I'm using an USB keyboard and =
the
keyboard driver is not yet loaded so I can't type anything on DDB console.

Despite kernel panic coredump was not created. This is most probably becaus=
e on
this device I have only limited amount of disk space (4GB).

If there is a way of using devctl rescan to hotplug this device after system
startup it would be great. The only idea I had is to modify iwn.c and remove
code from it until the system start panicking again to point me to the corr=
ect
line of code. But this is very time consuming because of all the recompiles.

I've made a low-tech picture with my phone.

--=20
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