Debian :: New Invalid Eth0 Connection On Boot
Jan 23, 2015
I'm using NetworkManager for networking.After a big Debian upgrade I had a new problem.Every boot it create a new (invalid) "eth0" connection, and NetworkManager connect automatically to it.As expected, the connection is invalid, and I'm not connection to the Internet.
What I do to fix this every boot is manually remove this wrong "eth0" connection and NetworkManager automatically connect to my good eth0 connection.
Note: If I boot my machine N times without deleting connections, I see N same and invalid "eth0" connections.I think this happen because /etc / network / interfaces conflicts with NetworkManager, but I don't know what trigger this. Here is my relevant configuration:
/etc/network/interfaces:
Code: Select all# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
[code]....
* No "/etc/NetworkManager/system-connections/eth0" connection is created in configuration, but it's displayed.
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Sep 20, 2010
I installed Debian 5.03 Lenny successfully on my machine. I got this error during boot: ACPI : invalid PBLK length [5]. After that the Operating System boots properly and starts normally. What does this error statement mean? Is it safe to work with this installation despite this error?
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Apr 22, 2011
im trying to setup eth0 with subdevice eth0.0 and eth0.99 to come up at boot
eth0 is dhcp clint
eth0:0 is static ip
eth0.99 is 802.1q vlan interface
/etc/network/interfaces
Code:
auto lo
[Code]....
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Jul 16, 2011
I am trying to sort out some issues following an upgrade from F12.
I have eth0 as the connection I want to use. Prior to the upgrade, this connection was enabled and active at boot.
Now, for some reason after the upgrade it has to be manually enabled at every boot - even though when I go the Network tool, Ethernet Device > General tab - "Activate device when computer starts" is checked.
At every boot time it is inactive.
In all the ifcft-eth0 files, the ONBOOT parameter is set to "yes".
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Mar 8, 2010
If I uncheck and recheck "Enable Networking" in the Network Manager Applet 0.7.996 I would expect the wired network to disconnect (which it does) and reconnect (which it does NOT). So I tried sudo ifdown eth0 and got
Quote:
Ignoring unknown interface eth0=eth0.
ifconfig tells me
Quote:
eth0 Link encap:Ethernet HWaddr 00:25:64:e8:18:2c
inet addr:192.168.0.112 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::225:64ff:fee8:182c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
so I am at a loss. How do I stop and restart the network interface short of rebooting the machine?
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Nov 30, 2015
I am using Debian 8 with systemd. I noticed that eth0 it is not starting automatically.
During boot process, I see this message: a start job is running for LSB: Raise network interface
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Mar 16, 2010
how do i stop eth0 from starting up when i boot/login ??
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Jan 16, 2010
I've been messing around with debian A LOT, getting to know it, seeing what makes it run. I recently screwed up big time and nearly rendered it unusable, but I managed to slowly repair it. However, I was unable to do any kind of auto-DHCP connections. Now when I put eth0 up, the connection will cut out after about 5 seconds, and I can't connect any more until I either restart the networking service or do ifdown then ifup.So can anyone suggest to me any logs I should look for, or any packages I should make absolutelyure I have installed and configured properly? Any config logs that need posting
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Jul 13, 2009
On my machine (Desktop PC) I have 2 network card : wireless (rt61 802.11) and a wired card (BCM44). When I install debian 5.
The wired card is detected and logical name eth0 is assigned, while wireless is not assigned I install firmeware* software to configure the card. It is done in some way ( I used mnetwork from mepis, it works fine).
Now the problem: eth0 disapears, and no eth0 inteface found? ifconfig gives just wlan0.
Question: Why there is no eth0, it was before configuration of wlan0 ?
How to active again eth0, or ho to create the logical eth0?
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Apr 23, 2011
I'm using 11.3 gnome and cannot fix the eth0 connection. Tried to make it work with connection manager, ifup but both of them did'n make eth0 work. Here are some logs that you might wanna see:
lsmod:
Module Size Used by nls_utf8 1165 1 st - Pastebin.com
ifconfig:
eth0 Link encap:Ethernet HWaddr 1C:6F:65:47:03:16 UP BROADCAS - Pastebin.com
ifdown eth0:
[Code]....
I have TP-LINK router that sends wireless signal through the house which I'm using on my laptop's Ubuntu to connect on the internet, also I can connect with Ubuntu from laptop via the same cable that I'm trying to use on my desktop, so the router and cable are working. Also on my dekstop I've installed Windows 7 and can't connect from there either. The computer is new so i doubt that there is something wrong with its hardware. It all started when my connection disappeared. My ISP advised me to reset my router by plugging out the power cable and plugging it back in after 5min, and so I did. After that I could connect only from laptop. Tried to reinstall suse, to install ubuntu, but nothing worked. When I installed suse on my friend's computer, the only thing that I had to do is to open YaST and change the Network setup method from ifup to the NetworkManager, and also insert the MAC adress in the connection's properties. Tried that on my computer, but also didn't work.
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Dec 13, 2010
When I log onto my Ubuntu 9.04 boot I am disconnected from the internet, on my windows 7 boot It works just fine, I have attempted disabling networking, power cycling the modem and router, and re-enabling networking, no dice though. hovering over the connection icon tells me that there is no network connection.
Opening the edit connections window tells me that there a wired connection called Auto eth0 that is set to never, and that is all that I can find. I hunted for other forums on this and found a few but none with a successful resolution.
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Apr 3, 2011
I'm running 10.04 and my eth0 connection disappeared. If I go into my network tools, I can see the IPv4 connection and test the ping and all. When I go to my network connections, I do not see the eth0 at all. I have not made any serious changes lately and have no clue to what could have caused this. I have tested the cable with my laptop, and it works fine. I have serious reddit browsing that needs to be done!
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Mar 1, 2009
I am setting up a fresh Fedora 10 install on an older computer for a roommate and have one odd little problem, everything else appears to be working just fine.
The network connection drops after about 2 minutes (somewhere between 90-120 seconds). This only happens in the installed Fedora 10; it does not happen at all when I boot a Kubuntu LiveCD.
Here's what I know:
The machine is a Dell Dimenision 4500, 2.0 GHz, 512Mb ram.
The ethernet card is 21x4x DEC-Tulip compatible 10/100 Ethernet.
Unplugging the ethernet cord and plugging it back in allows the network interface to come back up, grabs the right IP, but only holds it for another two minutes.
ifconfig and route show all the right info while the connection is good, but inet disappears once it goes down.
'ifdown eth0' and 'ifup eth0' do not bring it back up.
Is this a driver issue perhaps?
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Aug 25, 2010
I'm getting rather fed up with this Network Manager applet on Ubuntu and its seemingly erratic behavior.I often use my laptop for things like dhcp server to do pxe boot on other machines for netboot installs and other stuff. Often I have to set static address on eth0 etc.I know how to set a static address for eth0 by editing /etc/network/interfaces and all that good stuff, but when I click on the Network Manager applet, it says 'Wired Network - not managed'.I may have deleted it for some reason, but why does it no longer appear, even though eth0 is working?I've also found in the past that changes to interfaces in the Network Manager, such as giving eth0 a static address, do not seem to stick?
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Sep 25, 2010
I have recently upgraded the ubuntu desktop edition from 8.04 to 10.04. after upgrading i cannot show my eth0 nic interface in the System > Preferences > Network connections----- wired tab. and i also not getting network indication in the top of the panel beside the date time indication. but i can access network and using internet with that lan card. i cant understad my eth0 is connected or unpluged..
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Oct 15, 2010
I have two connections for my PC, my Ethernet which is on the corporate network and my smart phone on 'usb0'. Both have full internet access.I want to stop my PC from connecting to the internet over the Eth0 while still connecting to internal servers then just have internet over usb0.If I go to the settings of 'Auth Ethernet' in the tray area, under IPv4 there is the routings section - I've tried enabling "use this connection only for resources on its network" but it doesnt work.
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Apr 23, 2011
I'm getting rather fed up with this Network Manager applet on Ubuntu and its seemingly erratic behaviour. I often use my laptop for things like dhcp server to do pxe boot on other machines for netboot installs and other stuff. Often I have to set static address on eth0 etc. I know how to set a static address for eth0 by editing /etc/network/interfaces and all that good stuff, but when I click on the Network Manager applet, it says 'Wired Network - not managed'. I may have deleted it for some reason, but why does it no longer appear, even though eth0 is working? I've also found in the past that changes to interfaces in the Network Manager, such as giving eth0 a static address, do not seem to stick? It seems the only thing this applet is useful for is connecting to a wireless network.....and only with dhcp !!
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Jul 23, 2011
just wondering if I could get a hand with bridging my eth0 and wlan0 connection. I'm using Ubuntu 11.04 if that helps at all.
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Jun 16, 2010
I am running fedora vm under XP host and using NAT connection to the Internet. It usually works fine, but some time the connection is just lost. I went menu System->Admin->Network and see the interface eth0, but I cannot activate or deactivate. The status is inactive. (when the connect works, the status is active). so I try "ifdown eth0" and "ifup eth0" command, and got
"Error: Connection activation failed: Device not managed by NetowrkManger
The menu System->Admin->Network device control show no interface.
I am not sure what happened.
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Jan 19, 2011
I keep getting this error message:
The VPN connection '<insert name here>' failed because of invalid VPN secrets
I have Ubuntu 10.10 installed on a Dell Latitude D600. It's a fresh brand new install. After I installed all the updates, I proceeded to install network-manager-vpnc. Then, I imported .pcf files so that I can connect to the office VPN,but it gives me the error message above.I have gone to ~/.gnome2/keyrings and renewed everything.Tried moving them away, and then back again. Created a new keyring. Nothing.
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Jul 25, 2010
Code...
connection is set to connect automatically using dhcp... used to work, after a latest updates basically stopped working.
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Jan 23, 2010
i want to share the internet connection from Laptop to PC via LAN crossover cable
here's how i connect to the internet in laptop, and connected PC via LAN:
i need to share pppoe(ppp0) to (eth0) , that is what i've been doing in Windows before, but i dont know how to share in Linux, i tried to follow Ubuntu Help about ICS, but it doesn't work
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Aug 8, 2010
After rebooting, I found that the server couldn't see the network. The machine has dual gigabit ethernet (eth0 and eth1). eth0 is connected to the internet, but disappeared. ifconfig used to show eth0, eth1, and lo, but now only shows eth1 and lo. If I boot into rescue mode I can get internet and ifconfig returns eth0 and lo. Any ideas on how to fix this?
I apologize in advance if I ask any noob questions. I'm not a very experienced Linux user.
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Dec 1, 2010
I've got access to my LAN and the Internet via my wired ethernet connection. I'd like to share that access with my iPod Touch (device shouldn't really matter) via an Ad-hoc wi-fi network.
This tutorial in the docs seems to describe the right setup but is very out of date (7.04). Instead I found this tutorial and followed it to create the Ad-hoc wireless network. I was able to connect my touch to the resulting ad-hoc network without a problem, but I didn't have LAN/Internet access.What's the next step to get the clients on the ad-hoc network out to the Internet?I found this page in the docs that says I'd need to install dnsmasq-base and uninstalling dnsmasq. I checked and dnsmasq-base is already installed but dnsmasq is not. I do have dnsmasq in /usr/sbin but the package description makes it sound like this should come with dnsmasq. Is the page out of date? Will uninstalling dnsmasq cause other problems?
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Feb 24, 2011
I'm running Ubuntu 10.04.2 LTS and from time to time eth0 connection is lost.
Looking at syslog (below), if its a hardware (network card) problem or a software bug?
syslog file:
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Jan 4, 2016
I have a headless Pi running Rasbian on my network. Upon booting I'd like it to automatically connect via the VPN connection. However upon startup this does not occur. I'm relatively new to Linux/Raspbian, so the I might not be going about the issue in the correct manner!
I connect to the Pi via TightVNC viewer. However when connecting using this method the GUI access is not admin/SU, hence when I try and start the VPN connection it states that this is not possible as I am "Not authorised to control networking". The only way I can connect via the VPN is to hook up the Pi to a monitor and keyboard.
1) How can I ensure that the VPN connection occurs at startup?
2) Using TightVNC viewer, how can I access the gui in admin/SU mode?
3) Is it possible (easily) to connect to the VPN using terminal commands?
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Jan 11, 2010
This on a Vostro 1220 Laptop w/ Intel 5300 wireless:
A.I have long boot up time.I think it's because of the eth0 network search which I don't use.I have an intel wireless 5300 card running.How can I speed up the boot time, i.e. disable or change the eth0 at boot, the searching?
B:When I restart or shutdown, the screen flashes repeatedly and gets some garbled colors along the top before finally rebooting looks like windows ME or something).This vostro has an intel x4500HD vid chipset in it.
C.How do I get into gnome configuration editor to turn on Metacity compositing? Alt-F2 and run gconf-editor doesn't do it. I don't do compiz, but need compositing.
D.I need to install Chromium Browser as it sync my bookmarks.I have RPMforge enabled btw also...how can I do that? I.e. rpm repo for chromium?
This will help me get off to a running start so I can get up to speed on CentOS..
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Mar 3, 2010
Have been running ubuntu for sometime now and love its functionality...However since a recent update have the following issues..When I power on the laptop I get the toshiba logo followed by grub loading with the message ' invalid enviroment block" "unable to load default boot entries". When I then try to run the laptop off a LiveCd, the ubuntu splash screen appears with the loading process bar (horizontal line) displayed..however it then appears to display a black screen with no further activity..Now all of this is via an external monitor as my laptop screen shows no activity right from the very start with just a blank screen....so am really stuck here wondering if its a harware/software issue or a combination of both...
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Aug 10, 2010
Yesterday I did an upgrade and today my box is unable to connect to the internet.
I have tried another cable, it didn't help.
Basically NetworkManager does not connect eth0 to the network, if I try to run ifup from the command line I get:
Code:
I can see in network configuration settings, that the device has been correctly detected and eth0 interface is correctly activated, yet when I try to uncheck the box manage by NetworkManager and start it manually, it tells me that the cable is disconnected... I've tried two different cables, different ports on my router - no help.
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Mar 3, 2010
I have my ubuntu box hard wired into my network. It all works fine, until I reboot my ubuntu box. After reboot, it can no longer see the network. I have it set up with a static ip. Not sure that I set it up completely correctly but it works fine...when working.. To fix the problem, I enter terminal: ifup eth0 That fixes all know problems until next reboot. What do I need to do so that it will remember settings and automatically be hooked into the network at power up?
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