<p>Have you tried powering the laptop down and then removing the battery for a few minutes before re-inserting the battery and powering it back up with the ethernet connected?</p>
<p>I have run into a similar issue with ethernet and USB before and the problem was with device settings, though this was on different hardware (OpenWRT running on a Buffalo router and two different Asus laptops running different Linux distros). In one case it was refusing to detect network speeds correctly(10/100 when everything else detected gigabit) and the other a year later was detecting ethernet and USB at all.</p>
<p>That failing, trying another network followed by the Applestore or their support as Doug suggested may be the best option.</p>
<p>Matt </p>
<div class="gmail_quote">On Jul 14, 2012 6:11 PM, "Charles Shapiro" <<a href="mailto:hooterpincher@gmail.com">hooterpincher@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Colt -- my homebrew, hard-driveless firewall//router machine running<br>
SentryCD ( <a href="http://www.sentryfirewall.com/" target="_blank">http://www.sentryfirewall.com/</a> ) -- died Tuesday. After<br>
talking it over with a local guru I decided to get Out of the Hardware<br>
Business. I acquired an Asus NT-R16 (<br>
<a href="http://ca.asus.com/Networks/Wireless_Routers/RTN16/" target="_blank">http://ca.asus.com/Networks/Wireless_Routers/RTN16/</a> ) at Fry's for<br>
$85 with a $10 rebate. I flashed Tomato USB ( <a href="http://tomatousb.org/" target="_blank">http://tomatousb.org/</a> )<br>
onto it and configured it to be just like colt. One of the many great<br>
features of TomatoUSB is that it has dnsmasq built in, so I can even<br>
respond to local network dns requests with real ip numbers. Fun and<br>
simple! After about 2 hours of messing with it, the Asus was a<br>
drop-in replacement for the old colt.<br>
<br>
Alas, my wife's computer ( an Intel Macbook Pro running Macbook OS X<br>
10.7.4//Lion ) will no longer connect to my wired local network,<br>
claiming that the cable is unplugged. My own laptop -- and her old<br>
Apple powerbook -- connect just fine over the same cable, so I think<br>
that her machine is lying to me. It also won't connect to the network<br>
over a USB->Ethernet interface (an "Airlink 101 USB 2.0 Ethernet<br>
Adapter" ). It recognizes the device and loads some kind of USB<br>
driver for it, but no power or link lights ever appear on the<br>
interface box itself and the GUI claims the same thing about it<br>
("Network Cable Unplugged"). The USB port works for other devices.<br>
The USB->Ethernet device lights up and connects flawlessly on my linux<br>
laptop when used there. I have my wife's machine connected over wifi<br>
now, but since her machine is part of the server chain going to the<br>
inkjet printer that means I can't print pretty. The MAC OS 10 GUI<br>
seems to lack any way of enabling or disabling the built-in ethernet<br>
port, and googling has so far proved useless. I'm gonna try to<br>
connect her Mac to another wired network Monday, but my suspicion is<br>
that something is munged in the software which I lack the background<br>
to untangle.<br>
<br>
-- CHS<br>
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