Ubuntu
gnome-nettool package

Can't get wired networking connected

Asked by Jaime Cruz

I've gone through several answers and don't see anything helpful. I have an HP Pavilion desktop machine. I had it running and networking just fine on a wireless connection. I've moved the computer to my office and plugged it into the wired router, and then disabled the wireless connection.

Now I can't network at all. For some reason, the computer didn't automatically sense the wired connection, and I can no longer get the wireless connection to work either. I'm completely dead in the water.

I have 12.04 (32-bit) installed on my laptop, and that had no problems switching from the wired to the wireless adapter when I was in a hotel room, why am I having these problems with the 64-bit? What information do you need? I'm using my laptop right now as the desktop is unable to network in any fashion.

Thanks.

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Ubuntu gnome-nettool Edit question
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Jaime Cruz
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Revision history for this message
Jaime Cruz (jaime-cruz) said : 		#1

For more detail on the hardware:
HP Pavillion P7-1235

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actionparsnip (andrew-woodhead666) said : 		#2

If you run:

echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf > /dev/null

Do you get web access?

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Jaime Cruz (jaime-cruz) said : 		#3

Nope, nothing. I double-checked the command specified and I did type it exactly as shown. What other information do you need?

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actionparsnip (andrew-woodhead666) said : 		#4

If you run:

sudo lshw -C network

What is output?

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Jaime Cruz (jaime-cruz) said : 		#5

Thank you for your assistance, Andrew. While I was waiting for your response I discovered my problem was two-fold. The first was self-inflicted because I didn't know what I was doing as I was Googling symptoms. I found a reference to editing /etc/network/interfaces, and using the information I gleaned from ifconfig -a, I mistakenly added an entry for my wireless adapter. That's what killed my wireless connection. Took me awhile to figure that out, but once I removed that entry I got wireless back.

A little more digging once I had wireless back and I learned from the "sudo lshw -C network" command that eth1 was "UNCLAIMED" which means "no driver." I did a little searching on AR8161 and found this page:

http://askubuntu.com/questions/165192/how-do-i-install-drivers-for-the-atheros-ar8161-ethernet-controller

Turns out the driver is not part of the 12.04.1 LTS installation bundle and it has to be compiled into the kernel. Fortunately that page gives detailed instructions and once I was done, wired internet immediately became active.

So I learned a lot... most important: If you don't understand what you're doing, DON'T DO IT. On the other hand, how else do I learn, right?