Weird Ethernet Problem

tooonami · 10-15-2010, 05:15 AM

Hi, I did a fresh install of Ubuntu 10.04, then did the useual update to get all the latest fixxs.

I then downloaded the latest Nvidia driver from the official site and installed it.

After rebooting I noticed that I had no ethernet connection, I reformatted again and did it again but still the same thing is happening.

Could someone help me out and guide me through getting my internet connection back please as I'm a newb and need all the help I can get.

For ifconfig I get:

Code:

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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:480 (480.0 B)  TX bytes:480 (480.0 B)

For ifconfig down I get:

Code:

down: error fetching interface information: Device not found

For ifconfig up I get:

Code:

up: error fetching interface information: Device not found

The ethernet driver is installed as it was working before I installed the Nvidia driver.

prayag_pjs · 10-15-2010, 05:21 AM

Hi,

Try this to confirm eht0 is detected and link is ok

Quote:

sudo mii-tool

Do

Quote:

sudo ifconfig eth0 up

Also try to follow this guide to troubleshoot network interfaces.

tooonami · 10-15-2010, 05:40 AM

Thanks for your help.

For "sudo mii-tool" I get:

Code:

no MII interfaces found

FOR "sudo ifconfig eth0 up" I get:

Code:

SIOCSIFFLAGS: Cannot allocate memory

prayag_pjs · 10-15-2010, 05:53 AM

Hi,

Please confirm the network card make

and post the output of

Quote:

lspci| grep -i ethernet

Quote:

dmesg | grep -i ethernet

tooonami · 10-15-2010, 06:15 AM

Ok something weird is going on.

For "lspci| grep -i ethernet" I get:

Code:

00:0c.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10)

As soon as I entered the second command you gave me "dmesg | grep -i ethernet" My ethernet came back up and I'm now able to connect to the internet.

The output for "dmesg | grep -i ethernet" I get:

Code:

[    1.437680] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded

I'm just going for a reboot now to see if its up when I log back in.

EDIT: So back from the reboot and its still up and able to access the internet.

Thanks for your help buddy, seems that second command you gave me did the trick.

markush · 10-15-2010, 06:54 AM

hello tooonami,

it seems that your system lacks the kernelmodule für the Realtek device (I found a thread in a german debian-forum which refers to a similar issue).
Here the link to the forum: http://debianforum.de/forum/viewtopic.php?f=33&t=122185
They have this link to the Realtek-site: http://www.realtek.com/downloads/dow...3Cbr%3ERTL8169
A bugreport: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=573007

I hope this will help

Markus