Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

Here is the thing! am on day 5 of no wired internet connection. I have spent the last 4 days searching through every forum and Q&A sites, until i finally decided to post this, so I have done my homework. Before I take my laptop to maintenance shop for hardware failures i want to check with you guys first.

Problem Description: Like the question says my wired connection stopped working suddenly after an update. I am using ubuntu 12.04 LTS. Network Manager says Wired Networks disconnected. Wireless is working perfectly. And also it doesn't work on Windows 7 too, it says cable unplugged. I have tried the cable on other computer and it works perfectly.

nm-tool output:

NetworkManager Tool

State: connected (global)

- Device: wlan0  [Connectify-me] -----------------------------------------------
  Type:              802.11 WiFi
  Driver:            iwlwifi
  State:             connected
  Default:           yes
  HW Address:        9C:4E:36:29:F7:D4

    Speed:           58 Mb/s

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    TP-LINK_8AB114:  Infra, A0:F3:C1:8A:B1:14, Freq 2452 MHz, Rate 54 Mb/s, Strength 25 WPA2
    ZTE_HG_0:        Infra, 00:1D:0F:BF:BE:61, Freq 2437 MHz, Rate 54 Mb/s, Strength 47
    ZTE_HG_0:        Infra, 00:21:27:C1:19:D9, Freq 2437 MHz, Rate 54 Mb/s, Strength 39
    *Connectify-me:  Infra, E8:39:DF:3E:AF:8E, Freq 2462 MHz, Rate 54 Mb/s, Strength 87 WPA2

  IPv4 Settings:
    Prefix:          24 (


- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            atl1c
  State:             unavailable
  Default:           no
  HW Address:        00:1E:DE:F7:A6:C9

    Carrier Detect:  yes

  Wired Properties
    Carrier:         off

sudo lshw -C network output:

       description: Ethernet interface
       product: AR8152 v2.0 Fast Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: eth0
       version: c1
       serial: 00:1e:de:f7:a6:c9
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion= latency=0 link=no multicast=yes port=twisted pair
       resources: irq:48 memory:f7e00000-f7e3ffff ioport:e000(size=128)
       description: Wireless interface
       product: Centrino Wireless-N 2200
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: c4
       serial: 9c:4e:36:29:f7:d4
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-57-generic firmware= ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:46 memory:f7d00000-f7d01fff

ifconfig eth0 output:

eth0      Link encap:Ethernet  HWaddr 00:1e:de:f7:a6:c9  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

So there you have it guys! Let me know if you need additional information. So Please help me!!!

share|improve this question
come on guys am waiting!! Nobody here to help? –  tekesteg Dec 14 '13 at 10:58

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.