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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1453391

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1453391

Title:
  Very slow Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast
  Ethernet (rev b0)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After upgrading form Ubuntu 14.04 to Ubuntu 15.04, my gigabit ethernet
  controller is performing very very poorly.  I get < 10mb throughput.

  ------

  lspic:

  02:00.0  controller: Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or
  Fast Ethernet (rev b0)

  lshw:
          *-pci:4
               description: PCI bridge
               product: 82801JI (ICH10 Family) PCI Express Root Port 6
               vendor: Intel Corporation
               physical id: 1c.5
               bus info: pci@0000:00:1c.5
               version: 00
               width: 32 bits
               clock: 33MHz
               capabilities: pci normal_decode bus_master cap_list
               configuration: driver=pcieport
               resources: irq:28 ioport:c000(size=4096) memory:fe800000-fe8fffff ioport:f0800000(size=2097152)
             *-network
                  description: Ethernet interface
                  product: AR8121/AR8113/AR8114 Gigabit or Fast Ethernet
                  vendor: Qualcomm Atheros
                  physical id: 0
                  bus info: pci@0000:02:00.0
                  logical name: eth0
                  version: b0
                  serial: XX:XX:XX:XX:XX:XX
                  size: 1Gbit/s
                  capacity: 1Gbit/s
                  width: 64 bits
                  clock: 33MHz
                  capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
                  configuration: autonegotiation=on broadcast=yes driver=ATL1E driverversion=1.0.0.7-NAPI duplex=full firmware=L1e ip=XX.XX.XX.XX latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
                  resources: irq:17 memory:fe8c0000-fe8fffff ioport:cc00(size=128)

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