RELENG_7 and atheros ....
oberman at es.net
Fri Nov 16 11:41:55 PST 2007
> Date: Fri, 16 Nov 2007 13:03:32 -0600
> From: Eric Schuele <e.schuele at computer.org>
> On 11/15/2007 23:35, Kevin Oberman wrote:
> >> Date: Thu, 15 Nov 2007 22:08:13 -0600
> >> From: Eric Schuele <e.schuele at computer.org>
> >> Sender: owner-freebsd-current at freebsd.org
> >> 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 m> e.
> >> 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.
> > I have not seen this.
> >> 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?
> > Try 'ifconfig ath0 -bgscan'. Something causes my card to lose
> > association periodically when the background scan is in progress.
> Are you saying try the above *after* I've been disconnected? Or is it
> an attempt to reproduce the disconnect?
No. Try it as soon as your system comes up. It disables the regular
background scan for APs that, by default, happens every 5 minutes. Note
that I don't see my association go down on every scan, but turning this
off seems to prevent the disassociation from ever happening. I have
confirmation from at leat two others with the same Atheros chip-set that
this fixed their recurrent disconnects. (It certainly fixed mine.)
Note that this change will have a negative effect if you are roaming or
your environment changes in some way.
> >> 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.
> > Are you running wpa_supplicant? Are you using WPA,
> Yes, see below on my original post.
> > WEP or running open?
> > I see the card get "stuck" when scanning. It scans channels, but only
> > for WPA secured APs. When needing to associate with a WEP or open AP, it
> > never leaves WPA mode, so never associates.
> Hmm... yes, I 've noticed it doing this. Going around in circles
> through all the channels in WPA mode. odd. Any other work around other
> than bouncing the interface?
I have found that '/etc/rc.d/wpa_supplicant restart ath0' fixes it for
me. I added an alias to my .tcshrc file to save typing.
That said, I updated my sources last week and I don't recall seeing the
problem since then. Maybe it's fixed. I did see come fixes committed to
-current that might have been applicable, but I don't know if any have
been MFCed to 7.0 or if they will fix this.
I really need a bit more time to collect and analyze some debug data on
this so I can give Sam some good data to work with.
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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