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Im on a macbook (black, model 4,1), and it seems my ethernet doesn't work. When I plug in the cable, System Preferences > Network says:

alt text

This suggest that the ethernet card is at least partially aware that there is a cable connected, and that's why I'm not 100% sure it is a hardware issue. The yellow light is consistent; it doesn't switch between green/yellow/red. Without a cable Network (obviously) says:

alt text

The network is configured with DHCP. Info:

  • I've tryed plugging in other mac's and it configured automagically; worked straight away
  • Internet works fine when the same cable is connected to my Airport
  • Ethernet card is Marvell Yukon Gigabit Adapter 88E8055 Singleport Copper SA
  • Ethernet doesn't work in Ubuntu either
  • I can't ping anything.

So, bottom line: is the ethernet card broken, or could this be a software / configuration issue?

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are any other computers on your network having problems getting an IP address? – squircle Mar 4 '10 at 3:10
Nope - when I connect on wireless instead, using the same cable and my wireless router, there are no problems. – trolle3000 Mar 4 '10 at 3:14

2 Answers

up vote 4 down vote accepted

The only thing I can suggest is try to set the IP manually - it could be some program is interfering and not allowing the interface to acquire a DHCP address (but unlikely as you have tried through Ubuntu).

If it still does not work, you have really tried everything that I would other than to use a separate router (just to rule out some freak compatibility problem between network card and router!) - so I would say that the socket is broken.

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I'm going to try with another router. – trolle3000 Mar 4 '10 at 4:18
up vote 1 down vote

If you can connect to another router using the same cable, it's not your NIC. It's probably the first router. Did you reboot it?

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I've tried multiple times with reeboots in between. Sounds right to try another router... – trolle3000 Mar 4 '10 at 4:19

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