I have same issue. Ubuntu 16.04 64bit.
Atheros AR8121/AR8113/AR8114 1Gbps
Controller is integrated PCI-e on morherboard P5QL Pro.
Throughput is about 2Mbps.
I have tested also with 100Mbps USB network adapter, 3Com 100Mbps, different
cable, all other work fine, throughput ~10Mbps.
Tested kernels:
3.16.0-25-generic
4.4.0-45-generic
*-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: enp2s0
version: b0
serial: 00:24:8c:4c:f6:aa
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 firmware=L1e latency=0 link=no multicast=yes
port=twisted pair
resources: irq:17 memory:fe9c0000-fe9fffff ioport:dc00(size=128)
** Changed in: linux (Ubuntu)
Status: Expired => Confirmed
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https://bugs.launchpad.net/bugs/1453391
Title:
Very slow Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast
Ethernet (rev b0)
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