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Hi guys I am using Ubuntu 9.04. Things are cool, except for the annoying part about networking.
Say, if I am connected to a LAN cable, and somehow the connection is lost (let it be network congestion or my kicking the power cable), I will then be unable to get connected again.
I tried restarting the modem, unplugging and replugging it, clicking the network icon and telling it to connect, but the only thing that works is to restart the computer.
I know Karmic will be out in a few days but there's no warranty that the problem will be gone. So please tell me why and how to fix this, or at least some workaround (so that I don't have to restart the whole PC).
PS: everything is fine under Windows, which means it's not a hardware fault.

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2 Answers

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Run "tail -f /var/log/messages" before replugging your network cable. What messages appear? What if you run "sudo ifconfig eth0 down ;sudo ifconfig eth0 up"? Again, what messages appear in /var/log/messages? What if you run "sudo dhclient eth0"?

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great, thanks "sudo ifconfig eth0 down ;sudo ifconfig eth0 up" fixed the problem – phunehehe Oct 29 '09 at 13:35
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up vote 1 down vote

Try 

service network restart

in the terminal.

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you mean service networking restart? it says "OK", but doesn't connect :( – phunehehe Oct 29 '09 at 8:32
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