problem with ethernet connection in lenovo G580 with Qualcomm Atheros AR8162

[som]

hi,

i am having a problem with ethernet connection in my lenovo G580 laptop. network manager could not find the ethernet connection even when it is connected to the respective slot. i'll be grateful for any suggestion. 


~$ uname -r
3.13.0-30-generic
~$ uname -a
Linux som 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:40:53 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 20:89:84:3f:36:3f  
          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)
          Interrupt:16 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:439 errors:0 dropped:0 overruns:0 frame:0
          TX packets:439 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:50566 (50.5 KB)  TX bytes:50566 (50.5 KB)

wlan0     Link encap:Ethernet  HWaddr 68:94:23:fa:9a:cf  
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::6a94:23ff:fefa:9acf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2746 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3724 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1034164 (1.0 MB)  TX bytes:472797 (472.7 KB)

~$ sudo lshw -C network

  *-network               
       description: Ethernet interface
       product: AR8162 Fast Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci at 0000:01:00.0
       logical name: eth0
       version: 10
       serial: 20:89:84:3f:36:3f
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx latency=0 link=no multicast=yes port=twisted pair
       resources: irq:45 memory:e0500000-e053ffff ioport:2000(size=128)
  *-network
       description: Network controller
       product: BCM4313 802.11bgn Wireless Network Adapter
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci at 0000:02:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=bcma-pci-bridge latency=0
       resources: irq:17 memory:e0400000-e0403fff
  *-network:0 DISABLED
       description: Ethernet interface
       physical id: 3
       logical name: wwan0
       serial: 58:2c:80:13:92:63
       capabilities: ethernet physical
       configuration: broadcast=yes driver=cdc_ncm driverversion=22-Aug-2005 firmware=Mobile Broadband Network Device link=no multicast=yes
  *-network:1
       description: Wireless interface
       physical id: 4
       logical name: wlan0
       serial: 68:94:23:fa:9a:cf
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=brcmsmac driverversion=3.13.0-30-generic firmware=610.812 ip=192.168.1.100 link=yes multicast=yes wireless=IEEE 802.11bgn
~$ lspci -nn | grep 0200
01:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8162 Fast Ethernet [1969:1090] (rev 10)


regards,

som