Suddenly lost Ethernet connection

pimk · 03-01-2009, 10:56 AM

I am running Ubuntu 8.10 on a Acer Aspire One.
My wifi and ethernet always worked fine, but suddenly I can't connect with my wired connection anymore. Can't ping either.
When I do ifconfig only "lo" and "pan0" show up, no "eht0".
When i boot in WinXP it works fine, but for some reason won't work in Ubuntu??
I don't know what the source for this problem is, any ideas??
I'm just a newbie, so maybe it's really easy to solve.
Thanks

pentode · 03-01-2009, 12:43 PM

Are you saying the wireless works but not the wired connection? If both are connecting to the same router or subnet, you can only have one active at a time. Make sure wireless is off.

As root, you can try ifdown eth0 and then ifup eth0.

You can check lspci to see if the wired interface card shows up in the pci devices. If it doesn't, it means Ubuntu did not detect the hardware, so it certainly isn't going to work.

onebuck · 03-01-2009, 01:31 PM

Hi,

Welcome to LQ!

What does 'ifconfig -a' show?

Quote:

excert form 'man ifconfig';
If no arguments are given, ifconfig displays the status of the currently active interfaces. If a single interface argument is given, it displays the status of the given interface only; if a single -a argument is given, it displays the status of all interfaces, even those that are down. Otherwise, it configures an interface.

Note that by including the '-a' option you will get the status of all interfaces, even the ones that are down.