Arch Linux

fr!tz

Member

Registered: 2013-03-17

Posts: 2

Ethernet interface eth0 missing

Hi!
Since a few days, on my laptop (Thinkpad X200) there is no ethernet interface anymore.

The output of ifconfig:

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.101  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::221:6aff:fe11:a710  prefixlen 64  scopeid 0x20<link>
        ether 00:21:6a:11:a7:10  txqueuelen 1000  (Ethernet)
        RX packets 45280  bytes 47188889 (45.0 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 37841  bytes 5350719 (5.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I tried to reconfigure the device according to the wiki page, but the Ethernet section of lspci -v does not tell the kernel module:

00:19.0 Ethernet controller: Intel Corporation Device baad (rev 03)
        Subsystem: Lenovo Device 20ee
        Flags: bus master, fast devsel, latency 0, IRQ 11
        Memory at f2600000 (32-bit, non-prefetchable) [size=128K]
        Memory at f2625000 (32-bit, non-prefetchable) [size=4K]
        I/O ports at 1840 [size=32]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [e0] PCI Advanced Features

I am pretty helpless now and I would be glad if someone could give me a hint!

mich41

Member

Registered: 2012-06-22

Posts: 796

Re: Ethernet interface eth0 missing

Google for the right module/driver for the chipset. Once you know which module to use, you can load it with:

# modprobe module_name

Also, run dmesg and check if it prints any relevant error messages.

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,734

Website

Re: Ethernet interface eth0 missing

https://bbs.archlinux.org/viewtopic.php?id=156283
?

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ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,692

Re: Ethernet interface eth0 missing

Welcome to Arch.  Two things in addition to Graysky's link (TL;DR version of the link: It is probably not called eth0:)

1.  ifconfig is depreciated.  The preferred command now is a sub command of ip.   The command is: ip link
2.  ifconfig only displays the interfaces that have an address.  To see all the interfaces, use ifconfig -a   or, of course, ip link

Last edited by ewaller (2013-03-17 15:08:19)

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the sad clown

Member

From: 192.168.0.X

Registered: 2011-03-20

Posts: 837

Re: Ethernet interface eth0 missing

Welcome to Arch.  Two things in addition to Graysky's link (TL;DR version of the link: It is probably not called eth0:)

1.  ifconfig is depreciated.  The preferred command now is a sub command of ip.   The command is: ip link
2.  ifconfig only displays the interfaces that have an address.  To see all the interfaces, use ifconfig -a   or, of course, ip link

It might actually be called 'eth0', since his wireless is 'wlan0', but otherwise, you are right, he should be checking for all interfaces and not just those that have an address.

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