Weird problem with ethernet

[c0dege3k]

I recently noticed that my laptop's ethernet wouldn't work, so in checking the ifconfig I found that I no longer have an eth0 (I used to)- instead I have an eth41. I try doing ifconfig eth0 up, and it tells me that there is "no such device".

I don't know much about networking, so I don't know what info to give, but any and all help is appreciated.

[Iowan]

You can check sudo lshw -C network to see what is there for a definition. You might also check contents of /etc/udev/rules.d/70-persistent-net.rules

[c0dege3k]

Okay, the output for the first command is:



*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:06:00.0
logical name: eth1
version: 02
serial: c4:42:67:39:16:00
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:45 ioport:e800(size=256) memory:f6fff000-f6ffffff memory:f6fe0000-f6feffff memory:f6f00000-f6f0ffff


But where I think the trouble is is in that file. It's current contents are:



# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:24:8c:0f:7e:13", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x4232 (iwlagn)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:21:5d:5a:9d:84", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="c4:42:67:39:16:00", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"


However, there used to be up to eth41, until i deleted all but eth0 and wlan0 and rebooted. Now eth1 is back and ifconfig is reporting an eth1 in existence, but still no eth0.

[Iowan]

I'm curious what has the (hardware) address 00:24:8c:0f:7e:13...

[c0dege3k]

Um, just to be clear- was that you just wondering, or are you expecting me to do something? Like I said- I don't know much about this stuff.

[nm_geo]

Try


lspci -nn | grep -e 0280 -e 0200That should give the wireless & wired information.

Do you have 2 ethernet cards?? Oops..probably not huh?

laptop's ethernet wouldn't work

Note to self read the whole message.

[c0dege3k]

The output is:


03:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 02)


and no- as displayed above, I only have a WiFi card & one ethernet card

[nm_geo]

Yeah i saw that


ifconfig

Let's see that too..

[c0dege3k]

eth1 Link encap:Ethernet HWaddr c4:42:67:39:16:00
inet6 addr: fe80::c642:67ff:fe39:1600/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3960 (3.9 KB) TX bytes:3772 (3.7 KB)
Interrupt:45 Base address:0x8000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:183 errors:0 dropped:0 overruns:0 frame:0
TX packets:183 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:21871 (21.8 KB) TX bytes:21871 (21.8 KB)

wlan0 Link encap:Ethernet HWaddr 00:21:5d:5a:9d:84
inet addr:192.168.43.242 Bcast:192.168.43.255 Mask:255.255.255.0
inet6 addr: fe80::221:5dff:fe5a:9d84/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:131208 errors:0 dropped:0 overruns:0 frame:0
TX packets:138401 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:99510339 (99.5 MB) TX bytes:100629328 (100.6 MB)

[nm_geo]

Okay


sudo ifconfig eth0 down && sudo ifconfig eth0 upThen full output of


sudo lshw -C networkI would then recommend trying to reboot with ethernet cable installed..
See what happens..

[c0dege3k]

The first command outputs:


eth0: ERROR while getting interface flags: No such device


and the second one:


*-network
description: Wireless interface
product: WiFi Link 5100
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 00
serial: 00:21:5d:5a:9d:84
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-10-generic firmware=8.83.5.1 build 33692 ip=192.168.43.242 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:47 memory:fcffe000-fcffffff
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:06:00.0
logical name: eth1
version: 02
serial: c4:42:67:39:16:00
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:45 ioport:e800(size=256) memory:f6fff000-f6ffffff memory:f6fe0000-f6feffff memory:f6f00000-f6f0ffff


will report soon with the results of the reboot

[c0dege3k]

Some weird stuff happened when booting- shown in pics attached

[mitchman333]

will report soon with the results of the reboot

any updates on this issue..? i have the exact same problem and your steps so far seem identical - my Ethernet controller just stopped working on my last update (4 days ago).

Nothing has helped so far.

- Mitchman

UPDATE: Don't quite know how or why, but followed these instructions and Ethernet Connection is back up, http://ubuntuforums.org/showpost.php?p=8275776&postcount=6 (it was a long 4 days)