Still present in 15.10;  I rewired a new jack twice before I realized
what was going on here.

# lspci
00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller 
(rev 06)
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen 
Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor 
HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI 
Controller
00:16.0 Communication controller: Intel Corporation 9 Series Chipset Family ME 
Interface #1
00:1a.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI 
Controller #2
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio 
Controller
00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root 
Port 1 (rev d0)
00:1c.2 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root 
Port 3 (rev d0)
00:1c.3 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root 
Port 4 (rev d0)
00:1c.4 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root 
Port 5 (rev d0)
00:1d.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI 
Controller #1
00:1f.0 ISA bridge: Intel Corporation 9 Series Chipset Family H97 Controller
00:1f.2 SATA controller: Intel Corporation 9 Series Chipset Family SATA 
Controller [AHCI Mode]
00:1f.3 SMBus: Intel Corporation 9 Series Chipset Family SMBus Controller
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 
PCI Express Gigabit Ethernet Controller (rev 06)
03:00.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 41)
05:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection

PCI ID of Controller is the one integrated into my Gigabyte H97M-D3H
motherboard.

02:00.0 0200: 10ec:8168 (rev 06)


# mii-tool 
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 failed: Input/output error
eth0: negotiated 100baseTx-FD flow-control, link ok
eth1: negotiated 1000baseT-HD flow-control, link ok

# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full 
                                             100baseT/Half 100baseT/Full 
                                             1000baseT/Half 1000baseT/Full 
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: yes

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to net-tools in Ubuntu.
https://bugs.launchpad.net/bugs/845577

Title:
  mii-tool reporting incorrect duplex mode

Status in net-tools package in Ubuntu:
  Confirmed
Status in net-tools package in Debian:
  Confirmed

Bug description:
  mii-tool reports half duplex on full duplex connection when using
  RTL8168 series network cards. Ethtool does report the right speed.

  Same bug reported on debian by someone else.
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=561851

  terminal:
  #sudo mii-tool
  eth0: negotiated 1000baseT-HD flow-control, link ok

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/net-tools/+bug/845577/+subscriptions

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