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Ok so i just downloaded Ubuntu 12.04 onto and old Dell Inspiron 9300 and I need wired internet so i can download the appropriate wireless drivers. The problem being, the wired connection dies after a couple minutes. It works fine for a couple minutes then says "No network devices available". I have tried restarting network manager many times and several other solutions on this site, but none work. Please help.

 ifconfig -a
lo  link encap:Local Loopback
    inet addr: Mask:
    inet6 addr: ::1/128 Scope Host
    UP LOOPBACK RUNNING MTU:65536 Metric:1
    RX packets:84 errors:0 dropped:0 overruns:0 frame:0
    TX packets:84 errors:0 dropped:0 overruns:0 frame:0
    collisions:0 txqueuelen:0
    RX bytes:5806 (5.8 KB) TX bytes:5606 (5.8 KB)

 ifconfig eth0
     eth0: error fetching interface information: Device not found


auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp

if theres anything else please tell me

share|improve this question
Need more info - what is the hardware? "sudo lshw -C" or "lspci -nnk | grep -i ethernet" network will show this –  Scooby-2 May 7 '14 at 18:01

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