My laptop is working fine with its eth0 connection (wireless not
enabled while at home), so I know there is no problem with the router or
cable modem. But my desktop suddenly can't go anywhere, not even local
pings (printers, other devices).
The desktop is a six year old ASUS M2NPV-VM with gigabit ethernet
running Xubuntu 12.04. The ethernet has always worked fine, and it was
working fine this morning, but when I came home half an hour again it
can't see the network. The command "sudo ifconfig eth0 up" executes
without error, but just "ifconfig" shows eth0 without displaying an IP
address for it. The IP address 192.168.0.155 is reserved for it in the
router, and looking at the router with Firefox it appears to be
connected. I have shut down and restarted the desktop, and it boots
without apparent error.
I also did "dmesg |grep eth0" and I got several lines, like:
ADDRCONF(NETDEV_UP): eth0: link is not ready
forcedeth 0000:00.14.0 eth0: no link during initialization
Since the motherboard is about six years old I suppose it is possible
that the ethernet parts decided to die today. But I've never had
an ethernet device suddenly die. In any event, I need suggestions for
what to poke at next in order to figure out what is wrong.
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