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Recently I installed Ubuntu 10.10 on my dev box, making a dual boot with Windows XP. Before installation, everything worked fine, but now Windows XP cannot connect to the network saying that cable is not connected. I tried connecting it to different devices, and it always fails. Under Ubuntu I observe the same issue, but occasionally, usually it works and sometimes it can't find the network.

Do you people think it's Ubuntu related, or is my network card broken?

Septagram
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3 Answers3

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From your description I can only point to two possible failures:

  • Your network card is failing, as you guessed this is a hardware failure.
  • The cable is broken and you should try another cable.

Installing Ubuntu couldn't really have caused the issue, but sometimes these things coincide. Check your dmesg logs for clues, but I'm sure that you will need to replace the ethernet if it's a desktop and get a usb-ethernet dongle if it's a laptop.

Martin Owens -doctormo-
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Are you using DHCP? If not, ensure you are not using an IP address that is already assigned to another box.

BZ1
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Problem solved by re-establishing Windows contact with ethernet using an old PC. This is the second time this has happened, but I had assumed it was a hardware problem before on the first PC. As all is now well, I will not be restoring Ubuntu to this PC.