Wpi keep disconnecting

[Kevin Oberman]

> From: David Booth <davidb at boothscientific.com>
> Date: Thu, 18 Sep 2008 07:13:42 -0500
> Sender: owner-freebsd-mobile at freebsd.org
> 
> On Thursday 18 September 2008, Mark Kirkwood wrote:
> > Alberto Rizzi wrote:
> > > Sam Leffler ha scritto:
> > >> Check for a firmware update for your router.
> > >>
> > >>    Sam
> > >
> > > It already has the latest firmware (maybe 4 years old).
> > > Unfortunately I don't have other routers to try with.
> >
> > I would seriously doubt this is a router problem - I see the same
> > thing with an Asus laptop using wpi driver + WPA encryption. In my
> > case disabling the encryption was a workaround (a very poor one I
> > know). This appears to be a Freebsd issue AFAIK, as for instance
> > under Ubuntu I can have WPA enabled with such disconnection
> > occurring.
> >
> > regards
> >
> > Mark
> 
> I have a similar experience with wpi in a dell laptop running 7 stable 
> i386.  Without encryption, the connection will stay up without fail.  
> If I enable WPA, it disconnects at seeming random intervals that are 
> shortened by doing large file transfers.  Sometimes it will go for a 
> full day without disconnecting; however,  if I do a file ftp of a few 
> hundred megs, it may disconnect after a just a few minutes.  I do not 
> think that it is a hardware problem in either the card or the router 
> as when I boot the laptop into windows and use the same router and 
> same WPA settings, the connection remains rock solid even with 
> successive large file transfers.

This is a bit of a shot in the dark, but I happen to be on a WPA
connection today and I hit this one or something very similar. Since I
am on an Atheros, it may be different, but I made the problem "go awa"
with 'ifconfig ath0 -bgscan'. bgscan should not interfere in any way
with normal operation, but I have seen issues from it for some time
and al most always turn off bgscan as the first attempt to "fix" mystery
disconnects.
-- 
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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