On Sun, Sep 08, 2019 at 08:31:55PM +0000, Bryan Stenson wrote:
> Hi all -
>
> I'm writing to "misc" rather than "bugs" as I'm not yet sure this is a
> bug. I'm hoping to help triage this with assistance from this list.
>
> I'm running -CURRENT and the iwn(4) driver for my wireless card. Over
> the past year, this has been working great, but recently (within the
> last month or so), I've had issues where the NIC just stops working
> after a few hours of usage. I don't have a solid steps for
> reproduction.
>
> I realize "stops working" is not a very accurate account here...but
> I'm confused on how to get more descriptive information of the
> problem. When it stops, "ifconfig" shows iwn0 with an IP address, but
> I'm unable to ping. Additionally, I'm not seeing any
> warnings/messages in "dmesg" about the device...so I'm confused.
>
> A simple "ifconfig iwn0 down; sh /etc/netstart iwn0" seems to fix the
> problem, but I haven't had to do that in the past...it just feels like
> a recent change (iwn(4) work?) has put me in this state.
>
> I'm really wanting to help here. How can I run the iwn(4) in debug
> mode, or increase logging verbosity? And/or, should I try to capture
> packets via tcpdump? And/or, can I run an older bsd.mp (without
> having to downgrade packages to older versions) in order to try and
> "bisect" where the problem may have been introduced?
Please enable debugging with 'ifconfig iwn0 debug' and when the problem
reoccurs check whether you can find any relevant information in the
file /var/log/messages.
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