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Having installed 12.04 amd64 desktop from the alternative ISO (I'm using LVM on a RAID5 array), my networking fails after booting into the installed system.

It works fine on the 12.04 Live CD and alternative desktop CD. It appears to bring up the interface correctly, but isn't finding anything on the other end.

dhclient says that it can't find a broadcasting interface (but works fine on the Live CD). My networking hardware is an Atheros AR8131 using the atl1c driver.

I've done nothing to the configuration since the installation.

The output from the commands listed below is in this pastebin.

  • lshw -C network
  • dhclient -v
  • grep eth0 /var/log/syslog
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I'm confused (or maybe just clueless). I did not see any IPv4 addresses in your details. Is IPv4 enabled/working on your machine? Maybe it would help to add the output from /sbin/ifconfig and /sbin/route. – irrational John May 17 '12 at 21:11

1 Answer

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After the next reboot (to be able to answer the above comment) the networking magically started working. Absolutely nothing changed between reboots. So... solved by pixies, I guess.

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If this continues to work for you then please mark this answer as "best" so AskUbuntu stops putting it in front of people in hopes that it will be answered. (See also the link in this faq in this line: "It’s also OK to ask and answer your own question".) – irrational John May 17 '12 at 21:37
+1 for the pixies. – belacqua May 18 '12 at 20:39
I'm having trouble figuring out how to mark the answer as "best". – Scott Deerwester May 21 '12 at 13:55
@ScottDeerwester Do you see the 'checkmark in a circle' graphic under the up/down buttons? That's it. – belacqua May 21 '12 at 14:31

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