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Following the instructions here: https://juju.ubuntu.com/docs/config-
local.html to install juju-local to use the local provider for juju, I
installed the Raring backport packages onto my 12.04.3 LTS system
(linux-image-generic-lts-raring linux-headers-generic-lts-raring)

On completion of the package installation, I rebooted and discovered the
system had no IP address.

Looking at the syslog and everything seems fine:
Nov 14 14:34:18 deployer kernel: [    2.420570] Freeing unused kernel memory: 1588k freed
Nov 14 14:34:18 deployer kernel: [    2.423629] Freeing unused kernel memory: 1188k freed
Nov 14 14:34:18 deployer kernel: [    2.474560] e1000e: Intel(R) PRO/1000 Network Driver - 1.5.1-k
Nov 14 14:34:18 deployer kernel: [    2.474563] e1000e: Copyright(c) 1999 - 2011 Intel Corporation.
Nov 14 14:34:18 deployer kernel: [    2.474606] e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
Nov 14 14:34:18 deployer kernel: [    2.474621] e1000e 0000:00:19.0: setting latency timer to 64
Nov 14 14:34:18 deployer kernel: [    2.474948] e1000e 0000:00:19.0: irq 41 for MSI/MSI-X
Nov 14 14:34:18 deployer kernel: [    2.656521] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:1f:16:35:57:90
Nov 14 14:34:18 deployer kernel: [    2.656524] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
Nov 14 14:34:18 deployer kernel: [    2.656577] e1000e 0000:00:19.0: eth0: MAC: 9, PHY: 10, PBA No: A002FF-0FF

however, even though the eth0 device is configured to come up
automatically and grab a dhcp address, it does NOT come up and grab the
address.

After a boot, if I do an ifconfig, I only see the loopback device:

bladernr@deployer:~$ ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:500 errors:0 dropped:0 overruns:0 frame:0
          TX packets:500 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:98699 (98.6 KB)  TX bytes:98699 (98.6 KB)


if I do an ifconfig -a, it shows that eth0 is not configured:
bladernr@deployer:~$ ifconfig -a 
eth0      Link encap:Ethernet  HWaddr 00:1f:16:35:57:90  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:20 Memory:f2500000-f2520000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:500 errors:0 dropped:0 overruns:0 frame:0
          TX packets:500 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:98699 (98.6 KB)  TX bytes:98699 (98.6 KB)


if I do "sudo ifup eth0" I get a warning that eth0 is already configured
bladernr@deployer:~$ sudo ifup eth0
ifup: interface eth0 already configured

The ONLY way I can recover my ethernet device is to manually assign it
an IP address and the manually add  a default gateway so I can
communicate outside the laptop.

Once I've manually added the IP and gateway, I can get out and actually
work again.

This is 12.04.3 Server on a Thinkpad x201 with an Intel 82577LM gigabit
NIC onboard.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.8.0-33-generic 3.8.0-33.48~precise1
ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
Uname: Linux 3.8.0-33-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic.
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D3', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D3p', '/dev/snd/by-path', '/dev/snd/controlC29', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info: Error: [Errno 2] No such file or directory
Card0.Amixer.values: Error: [Errno 2] No such file or directory
Card29.Amixer.info: Error: [Errno 2] No such file or directory
Card29.Amixer.values: Error: [Errno 2] No such file or directory
Date: Thu Nov 14 14:21:43 2013
HibernationDevice: RESUME=UUID=4fbd4508-b7b2-4554-8d40-17c8a6aea11d
IwConfig: Error: [Errno 2] No such file or directory
MachineType: LENOVO 3626R3U
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-33-generic root=UUID=377d4265-17e0-46cf-925f-02808cbf8df6 ro splash quiet vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.8.0-33-generic N/A
 linux-backports-modules-3.8.0-33-generic  N/A
 linux-firmware                            1.79.7
RfKill: Error: [Errno 2] No such file or directory
SourcePackage: linux-lts-raring
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/07/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET46WW (1.16 )
dmi.board.name: 3626R3U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6QET46WW(1.16):bd06/07/2010:svnLENOVO:pn3626R3U:pvrThinkPadX201:rvnLENOVO:rn3626R3U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3626R3U
dmi.product.version: ThinkPad X201
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug bios-outdated-1.40 precise qa-kernel-lts-testing third-party-packages
-- 
Raring LTS backport kernel breaks dhcp when bringing ethernet device up
https://bugs.launchpad.net/bugs/1251401
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