Public bug reported:

Partial lshw output:
  *-network
       description: Ethernet interface
       product: AR8161 Gigabit Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: eth0
       version: 08
       serial: 70:54:d2:97:05:11
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix bus_master cap_list ethernet 
physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx duplex=full 
latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:30 memory:f7100000-f713ffff ioport:d000(size=128)

Partial ifconfig output:
eth0      Link encap:Ethernet  HWaddr 70:54:d2:97:05:11  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1276 errors:609 dropped:0 overruns:609 frame:0
          TX packets:1215 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:230131 (230.1 KB)  TX bytes:142978 (142.9 KB)
          Interrupt:17 

The ethernet adapter stopped working on upgrade from linux
3.19.0-16-generic to 3.19.0-18-generic. Upon inital system start, I can
successfully ping a remote server, but once I try any TCP connection,
even ping fails.

If I fallback to 3.19.0-16, everything is working OK.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-18-generic 3.19.0-18.18
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
Uname: Linux 3.19.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  mark       2611 F.... pulseaudio
 /dev/snd/controlC1:  mark       2611 F.... pulseaudio
 /dev/snd/controlC0:  mark       2611 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat May 23 10:21:44 2015
HibernationDevice: RESUME=UUID=b4733b71-2c28-4a85-8450-6f330135cfe4
InstallationDate: Installed on 2013-04-24 (758 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 
(20130213)
MachineType: Hewlett-Packard h8-1360t
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic 
root=UUID=578349d7-ca6f-4750-b977-7674ad95c763 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-18-generic N/A
 linux-backports-modules-3.19.0-18-generic  N/A
 linux-firmware                             1.143.1
RfKill:
 0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-05-20 (3 days ago)
dmi.bios.date: 07/02/2012
dmi.bios.vendor: AMI
dmi.bios.version: 7.15
dmi.board.name: 2AD5
dmi.board.vendor: PEGATRON CORPORATION
dmi.board.version: 1.03
dmi.chassis.asset.tag: 2MD3140FD9
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnAMI:bvr7.15:bd07/02/2012:svnHewlett-Packard:pnh8-1360t:pvr1.00:rvnPEGATRONCORPORATION:rn2AD5:rvr1.03:cvnHewlett-Packard:ct3:cvr:
dmi.product.name: h8-1360t
dmi.product.version: 1.00
dmi.sys.vendor: Hewlett-Packard

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1458208

Title:
  AR8161 ethernet stopped working after upgrade from 3.19.0-16 to
  3.19.0-18

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