[Bug 900903] Re: "Waiting for network configuration" due to uncommented 'auto' lines in /etc/network/interfaces (historical installer/upgradebug?)

[Stéphane Graber]

Marking as Won't fix, as unfortunately none of the fixes mentioned
before seem to deal with all the cases and they all sound like they
might cause significant breakage if they go wrong.

So far what was mentioned is that somewhere between 8.04 and 10.04, we
switched from having Network Manager ignore /etc/network/interfaces to
having it consider such a declaration as being a "don't touch the
interface".

We then introduced in 11.10 some code waiting for all interfaces defined
in /etc/network/interfaces (and marked auto) to be up before continuing
the boot sequence.

People who would have upgraded their machine all the way from 8.04 with
a similar /etc/network/interfaces would still have a working setup on
12.04 as ifupdown would be doing the dhcp query and Network Manager
would ignore the interface (agreed, not what we WANT, but still a
working setup).

Now the problem is when on top of that, you've changed hardware and eth0
no longer exists. That'd confuse any system, including Network Manager,
but it only slows down the boot when combined with an entry in
/etc/network/interfaces.

Overall, I think this is enough of a corner case that it's not worth
spending time fixing. I scanned other bug reports and it's the only
reported case of that bug with currently 4 people marked as affected.

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https://bugs.launchpad.net/bugs/900903

Title:
  "Waiting for network configuration" due to uncommented 'auto' lines in
  /etc/network/interfaces (historical installer/upgradebug?)

Status in “ifupdown” package in Ubuntu:
  Won't Fix

Bug description:
  I get the message on each boot. It is followed by "Waiting up to 60
  more seconds for network configuration". After that system continues
  to boot. When loging to KDE network is up and running. This bug
  appeared after upgrade to Oneric.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: upstart 1.3-0ubuntu11
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Tue Dec  6 20:46:27 2011
  ProcEnviron:
   LANGUAGE=pl_PL:pl:en_GB:en
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  SourcePackage: upstart
  UpgradeStatus: Upgraded to oneiric on 2011-10-13 (53 days ago)

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