*** This bug is a duplicate of bug 388060 ***
    https://bugs.launchpad.net/bugs/388060

@Daniel: What's in /var/log/netboot.config on the affected system at the
point where you can't connect?

We have established that nothing is in /run/network/interface/ then, but
casper should have written /run/network/interface/casper.  It appends
the latter file to /root/var/log/netboot.config.  If we see

    # /etc/resolv.conf
    # Autogenerated by casper
    search canonical.com
    domain canonical.com
    nameserver 10.153.104.60

in there then we can conclude that /run/network/interface/casper got
written but was deleted later.

If /run/network/interface/casper never got written then we need to debug
scripts/casper-bottom/23networking.  We need to find out why the code
quoted in #11 is never reached.

Can you add some logging commands to the script to find out what the
results are of the individual tests?  The tests I have in mind are the
following ones.

    -f /root/etc/resolv.conf 
     -z "$(cat /root/etc/resolv.conf)"
    -n "${DEVICE}"
     -e /tmp/net-"${DEVICE}".conf 
    -x /root/sbin/resolvconf 
    -L /root/etc/resolv.conf

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https://bugs.launchpad.net/bugs/1013843

Title:
  resolv.conf empty when doing PXE installations

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