RELENG_7 and atheros ....
Kevin Oberman
oberman at es.net
Wed Nov 28 12:01:45 PST 2007
> Date: Tue, 27 Nov 2007 09:24:29 -0600
> From: Eric Schuele <e.schuele at computer.org>
> Sender: owner-freebsd-current at freebsd.org
>
> On 11/15/2007 22:08, Eric Schuele wrote:
>
> > Hello,
> >
> > I'm having some strangeness with respect to my atheros based card on
> > releng_7. This may not sound like much... but together they concern me.
> > I'm wondering if anyone has seen similar things.
> >
> > 1) I've seen two panics while trying to bring the interface up over
> > the last few weeks.
> > 2) I get disconnected every night from my wireless router at home.
> > 99% of the time it happens after I've gone to bed. Once or twice...
> > while I was sitting in front of it. It just disassociates?
> > 3) When I am at the office, my card will *never* obtain an ip address
> > from our DHCP server upon first booting. I must *always* down the
> > interface, kill dhclient, bring the interface up and start dhclient.
> >
>
> As a follow up for the list...
> I rebuilt world and kernel on Nov 22nd. Since this time I have not
> noticed the above mentioned issue #3. I did not dig through any commit
> logs... but appears as though something changed to fix it.
>
> Fwiw...
> Note that I did make a change to fix item #2 on the advice of another
> FreeBSD'er. That change did not affect item #3. I did still see item
> #3 occurring until I rebuilt on the 22nd.
>
> Thanks to all.
I will also confirm the exact same experience. With more recent kernels I
no longer see problem #3. I just associate on boot.
I still need to disable background scanning to maintain stable
connections.
If there is only a single AP available, I lose association on occasion,
usually about 10-15 times a day and re-establish the association in
under 10 seconds. It's only slightly annoying.
If there are multiple APs with the same SSID, things are much worse. The
network seems to die every 5 minutes and take long intervals to
re-associate, making the network pretty useless.
In either case, 'ifconfig ath0 -bgscan' makes things work, again, at
some cost to stability if I move around while online, but I don't tend
to do this.
Some day, when I have a bit of time, I will collect debug information on
this so that Sam or someone else who understands the code might be able
to track it down.
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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