From mboxrd@z Thu Jan  1 00:00:00 1970
From: Roland Dreier <rdreier@cisco.com>
Subject: Re: [Bugme-new] [Bug 14794] New: IP address assigned by DHCP is  dropped after ~40 seconds
Date: Fri, 18 Dec 2009 00:16:13 -0800
Message-ID: <adaskb83df6.fsf@roland-alpha.cisco.com>
References: <bug-14794-10286@http.bugzilla.kernel.org/>
	<20091216154713.f082e7cf.akpm@linux-foundation.org>
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Cc: Jarek Poplawski <jarkao2@gmail.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Andrew Morton <akpm@linux-foundation.org>,
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 > Unfortunately reverting the commit 61cbe54d9479ad98283b2dda686deae4c34b2d59 on
 > top of 2.6.32 does not solve the problem.

Is there any possibility that one of the steps of the bisection was
wrong?  Could you possibly have accidentally marked a "bad" kernel as
"good"?

Addresses like 169.254.123.251 are RFC 3297 zeroconf link-local
addresses.  I think network manager will assign one of those if it
thinks the DHCP negotiation failed.

It might be informative to compare the network manager and dhclient log
output (maybe in /var/log/daemon.log?) in the good and bad cases.

 - R.