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[Launchpad Bug Tracker <1452119@xxxxxxxxxxxxxxxxxx>]

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After upgrading, the ethernet connection doesn't connect.
If I run ifconfig with the ethernet unplugged, I get:
% ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:90:f5:c7:69:b7  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:293047 errors:0 dropped:1 overruns:0 frame:0
          TX packets:341795 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:75754614 (75.7 MB)  TX bytes:77108082 (77.1 MB)
          Interrupt:38 

With the ethernet plugged in, I get:
%  ifconfig
eth0      Link encap:Ethernet  HWaddr 00:90:f5:c7:69:b7  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:293286 errors:0 dropped:1 overruns:0 frame:0
          TX packets:342195 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:75797513 (75.7 MB)  TX bytes:77249665 (77.2 MB)
          Interrupt:38 

The differences in the outputs are that (a) RUNNING, (b) packets
received and transmitted after plugging it in, although no ip address is
reported.

% lspci -nnk | grep -iEA3 "(ethernet|network)"
03:00.0 Ethernet controller [0200]: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller [197b:0250] (rev 05)
        Subsystem: CLEVO/KAPOK Computer Device [1558:7100]
        Kernel driver in use: jme
03:00.1 System peripheral [0880]: JMicron Technology Corp. SD/MMC Host Controller [197b:2392] (rev 90)
--
04:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] [8086:0091] (rev 34)
        Subsystem: Intel Corporation Centrino Advanced-N 6230 AGN [8086:5201]
        Kernel driver in use: iwlwifi
05:00.0 FireWire (IEEE 1394) [0c00]: JMicron Technology Corp. IEEE 1394 Host Controller [197b:2380] (rev 30)

If I run
% sudo ifconfig eth0 down
% sudo ifconfig eth0 up
System Settings/Network/Wired show the interface activate briefly, then go back to the disconnected state.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: unity-control-center 15.04.0+15.04.20150410-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue May  5 10:38:15 2015
ExecutablePath: /usr/bin/unity-control-center
InstallationDate: Installed on 2013-05-02 (733 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: unity-control-center
UpgradeStatus: Upgraded to vivid on 2015-04-26 (8 days ago)
usr_lib_unity-control-center: deja-dup 32.0-0ubuntu5

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid
-- 
ethernet interface broken after upgrade from 14.10 to 15.04
https://bugs.launchpad.net/bugs/1452119
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