eth0 disappeared

snep · 2010-12-01 22:37:27

Just what it says on the lid. eth0 just disappeared, no idea how. First noticed there not being any wired option in nm-applet. Wireless works. It worked normally during and after installation, I have no idea when it changed.

 
[root@lolbutts trabant]# ifconfig -a
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:6 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:300 (300.0 b)  TX bytes:300 (300.0 b)

wlan0     Link encap:Ethernet  HWaddr 74:F0:6D:0A:57:6E  
          inet addr:192.168.1.8  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::76f0:6dff:fe0a:576e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2503 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1899 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1536750 (1.4 Mb)  TX bytes:263508 (257.3 Kb)
[root@lolbutts trabant]#

[root@lolbutts trabant]# lspci
00:00.0 Host bridge: Intel Corporation Pineview DMI Bridge
00:02.0 VGA compatible controller: Intel Corporation Pineview Integrated Graphics Controller
00:02.1 Display controller: Intel Corporation Pineview Integrated Graphics Controller
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation Tigerpoint LPC Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA AHCI Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
01:00.0 Network controller: Atheros Communications Inc. Device 002c (rev 01)
[root@lolbutts trabant]#

What else to post?

defrysk · 2010-12-01 23:02:49

If you have updated your Networkmanager:
Make sure you have nm-system-settings.conf.pacsave same as /etc/NetworkManager/NetworkManager.conf
The new nm applet has its config files in NetworkManager.conf now.

snep · 2010-12-01 23:18:14

Oh I just misread your post. I updated now, after re-reading, no difference. eth0 is still nowhere to be found.

Is there a way to run networkmanagers autodetect again? Perhaps it would find eth0 like the first time?

Last edited by snep (2010-12-01 23:34:42)

CountDuckula · 2010-12-01 23:53:27

First place to check is /etc/rc.conf and make sure all references to eth0 are commented out and the interface itself is disabled using a ! such as below,

#eth0="dhcp"                                                                    
#wlan0="dhcp"                                                                   
INTERFACES=(!eth0 !wlan0)

until this is done NetworkManager (and other third party managers) wont recognize the interface for use.

Last edited by CountDuckula (2010-12-01 23:54:04)

.:B:. · 2010-12-02 07:22:25

First place to check is dmesg output, where you can get some clues about interfaces being recognised and possible errors during module/firmware loading.

His ifconfig output clearly shows no eth0, that means there is no such interface. I've rarely seen ifconfig being wrong . Rc.conf having eth0 disabled only means that it won't be given an IP (be it statically or through DHCP). The only way in which rc.conf could be relevant here is when the OP would have (intentionally) disabled the related modules, but we may reasonably assume that's not the case here.

tomk · 2010-12-02 09:25:22

lspci only shows one network device, the Atheros. My guess is hardware failure.

RaisedFist · 2010-12-02 09:55:53

what happens if you do

ifconfig eth0 up

then try to list the interfaces?

Arch Linux

#1 2010-12-01 22:37:27

eth0 disappeared

#2 2010-12-01 23:02:49

Re: eth0 disappeared

#3 2010-12-01 23:18:14

Re: eth0 disappeared

#4 2010-12-01 23:53:27

Re: eth0 disappeared

#5 2010-12-02 07:22:25

Re: eth0 disappeared

#6 2010-12-02 09:25:22

Re: eth0 disappeared

#7 2010-12-02 09:55:53

Re: eth0 disappeared

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