General :: Lost Connection - Cannot Activate Eth0 / What Happened?
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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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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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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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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May 21, 2011
I am unable to connect to the internet in fedora (XP connects fine) I normally use wifi, but have also checked the wired connection.
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Mar 4, 2009
how can i activate eth0 on terminal ?
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Dec 31, 2009
I have a dell mp1210 xps laptop. I just recently installed installed Ubuntu 9.10 and am very green. With difficulty I managed to install the drivers for the wireless card and now have wireless on the laptop. In order to get the wireless working I had to restart my computer, and once it booted up again the wireless works, but there is no trace of eth0-my wired network device (Broadcom BCM4401-B0) which was working fine before I got the wireless adapter working. Lspci still shows the device as it did when it was functioning, but ifconfig only shows my local loopback and wlan0 (my wireless device). I am not sure how eth0 got deleted, I am wondering if maybe I have to set up some sort of switching between the wired and wireless adapters so they are not both active at the same time. Any suggestions would be really nice, I have been digging through the forums, but I am unsure of what went wrong or what to do about it.
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Oct 24, 2009
When I activate eth0, the system says that the eth0 seems not exist. However, I can surf in the internet.
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Apr 29, 2010
When i wan to activate device in network configuration, it pop out with "CANNOT ACTIVATE NETWORK DEVICE ETH0". There is a sentence after this also : "rlt8129 device eth0 does not seem to be present, delaying initialization."
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Aug 1, 2010
I've an Acer Aspire One A110 Netbook running Linpus Lite. All seems relatively well however I've plugged in a Bluetooth USB dongle and nothing has happened - oh well, I didn;t expect it to. Of course I'm used to MS Windows OS plug 'n Play and I know this isn't generally how Linpus Lite OS operates but despite looking around I can't find an explanation on how to activate the Bluetooth adapter. There are instructions and demos on how to add a Bluetooth component to the board but I'm not an engineer, neither professional nor hobbyist, so Im not interested in doing that. I've downloaded the Bluetooth zip file from the Acer Spire One support site it has been installed on the Netbook but there still appears to be no Bluetooth connection.
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Apr 3, 2011
I am new to linux.Use broadband wire-line internet connection that requires username and password. Using GUI in Administration--Network I see realtek 8129 fast ethernet configured. However when I try to create new connection and activate it, it shows could not activate. eth0 inactive.
I am able to use my broadband connection in windows XP.
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Feb 7, 2010
Need help on a activating xDSL Connection on machine startup, i have configured the internet through it but every time when machine boots up...it is annoying to activate this interface manually. do guide on this....i am using Fedora core 12...and can you help on the firefox's "work offline" bottle neck.
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Dec 3, 2010
I was using yum to update a server, then my putty session to the server dropped.
I reconnected, and now when i try to do a yum list updates, i get the following message:
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 42 M RSS ( 53 MB VSZ)
Started: Fri Dec 3 12:05:30 2010 - 06:55 ago
State : Sleeping, pid: 21762
Does that mean its still installing the updates i asked it to, and i just need to wait for that to finish so i can see what updates are left? or am i really in a bad spot now?
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Jun 15, 2011
I wanted to try to install one of those public VPN services in order to try a software program. I setup a VPN for a service that is located in the UK. I successfully installed the VPN that just required me to use their gateway address and they also supplied the username/password. All I did was edit the connections from the Ubuntu Network Manager to add the VPN. After rebooting I no longer have my wired "eth0" connection listed and the Network Manager shows a red X.
I use a DSL service and my computer is directly connected to the router. I am using Ubuntu Natty 11.04. I read where you may have to edit the /etc/udev/rules.d/70-persistent-net.rules because it may cause an entry of eth1 instead of eth0. My file still shows eth0. I have also deleted the contents of that file and rebooted, as suggested in other posts, and eth0 is in the file, but still does not show in my Network Manager.
If I type in terminal: sudo ifconfig | grep eth, I get an output of:
eth0 Link encap:Ethernet HWaddr [my mac address]
Going to Whois shows my IP address as that from my local ISP. Clicking on Network Manager > Connection Information, I receive a window that states : "No valid active connections found". Obviously, I am connected to the Internet. Is there a way to restore my eth0 connection?
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Jan 29, 2011
Using acer aspire one (ZG5) and have lost connection to Firefox browser after changing setting to make google my home default web page. I have no experience with linux so any help would be appreciated. There's no problem with my internet connection it shows connected.
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Dec 28, 2010
The problem I'm having is on a CentOS4 machine. I don't use CentOS regularly (Ubuntu and Mint, yes) so I'm not sure if this is something that is particular to CentOS or not. I have this workstation that controls a microscope controller. The drives in this computer are some POS Seagate drives where the data storage drive has already conked out more than once. I think this time there was a problem with the OS drive that caused a lot of filesystem errors. I wasn't able to boot the OS at first but I ran fsck from a liveCD and was able to fix the (hundreds of) errors and the OS can now boot from the drive. The problem ave now is the ethernet does not work. I know there's not a problem with the ethernet controllers because I can access the internet through the liveCD. When I try to activate eth0, or eth1, I get the following error:Quote:
Cannot activate network device eth0!
network-functions: line 180: ip: command not found
WARNING: /lib/modules/2.6.9-89.0.9.ELsmp/modules.symbols line 1: ignoring bad line starting with 'GROUP'
[code]...
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Apr 22, 2010
My 9.10 has lost it connection to my router.Lucid finds it ok as Auto ethO , XP gets on the net ok as wellHow do I fix Karmic ? I click on network, it is greyed out but still lets me edit connections and add wired as auto etho but still no connection.Not sure what else to do ?ifconfig -a shows -
Code:
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:22:15:20:1b:3f
[code]....
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Feb 4, 2011
I have an Acer Aspire One Netbook that has lost connection with the Internet. On clicking the Browser button I get a message saying "Your wired device is now connected" - but nothing happens. It was working fine up till about a week ago. A substituted computer will work OK from the same output from the Router/ Modem through the same cable.
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Feb 14, 2011
I installed ubuntu 10 just yesterday. Everything was working just fine. The auto-update function advised me to download and install the latest updates and so I did. It was over 300 MB. I installed it, did a reboot and my internet connection was lost. I tried a few things I found on this forum yesterday. Nothing worked. I can go on-line on the same computer using windows 7. But I always have to reboot to try the different solutions. All right that's fixed! But now I just have to fix Firefox...
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Jan 1, 2010
I'm relatively new to Linux.My netbook ran updates yesterday for Ubuntu and now I am unable to reconnect to wireless network connection.I am using WPA2 encrypted security.I am able to connect via wired LAN. Also, when I went to connect using USB mobile connection, I get an error "unable to mount location". I get the same error if I try to connect my external CD drive. I have tried to force mount but no luck.
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Aug 10, 2010
How ubuntu 9.10 netbook is36 activate its network connection?
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Sep 29, 2010
New to ubuntu. I love the OS. Everything works great except for the network connection. It tells me I need to activate the b43 drivers with fwcutter, but here are the following problems:
1) I can't download and install the drivers b/c I can't connect to the internet wired or wireless.
2) I can't find the website to download the appropriate drivers (I've looked for hours)
3)I'm not too sure how to install them since I don't have a background in coding.
I really like ubuntu, I just need network working.
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Jan 19, 2011
I can get a tunnel connected via terminal with: openvpn --config client.ovpn
However, when I tried to use the "friedly" gui (gadmin-openvpn-client), it keeps telling me to "import server certificates into client first."
I don't know what that means. Nor, do I see a tun device.
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Mar 3, 2010
I got two IP's in my dedicated server. Both are external IP's. I would like to make connections using 2nd IP address under eth0:0 interface. For example: when using "lynx whatismyip.com" should display my 2nd IP. How to do this using iptables ?
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Jun 28, 2010
i am using ubuntu and with all versions i have one pretty anoying problem. My wired connection sometimes lost connection and i can't reconnect for 3-10min. sometime longer. Technically everything is allright. With win7 i never had such problems. Any solutions how to fix this problem? Laptop: Lenovo Sl510 T5870(2GHz), 2GB RAM, 250GB 5400rpm HD, 15.4in 1366x768 LCD, Intel 4500MHD, CDRW/DVDRW, Intel 802.11agn wireless, Bluetooth, 1Gb Ethernet, UltraNav, Camera, 6c Li-Ion
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Sep 26, 2010
I'm been wanting to try Ubuntu for a while now, and when my mom's netbook started to get insanely slow with WinXP, I tried the Netbook Remix on a USB stick. I LOVE it, except I am unable to get the wireless working, which is the only thing stopping me right now from a full install.
I believe my problem is that I need to activate the two drivers "Broadcom B43 wireless driver" and "Broadcom STA wireless driver" which appear as unactivated when I go into the hardware drivers admin tools. Unfortunately this netbook (HP Mini Netbook FW376UA) does not have an Ethernet port, so I can't just temporarily hard wire it to activate these drivers.
So my main questions are: 1) How can I activate those drivers without an internet connection?, and 2) Do you think that activating these drivers is indeed the answer to getting the wireless working?
The details:
Machine: HP Mini Netbook FW376UA
Network Controller: Broadcom Corporation BCM4312 802.11b/g
Ubuntu version: Ubuntu 10.04 Netbook
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Nov 11, 2010
I have a problem with my wifi adhoc network which I previously had under Windows. I go to network connections, edit connection ,wireless,add then change to adhoc then I cannot press the add button as it is not highlighted, I don't want any security so have not enterd any WEP or WPA information, also How do I do a scan for wireless networks/devices in my area?
I have a number of devices plus the chap next door who connects to my wired internet connection using my wifi adhoc network that are unable to do so at present.
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Jun 6, 2010
I m using redhat enterprise linux 5 desktop
i hav a broadband connection through bsnl dna-a211-1 modem
how to activate the connection into my laptop with redhat enterprise linux5?
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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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Apr 30, 2011
I would like to use my S-video connection on my ATI Mobility Radeon x1400 Laptop but I don't know how to do it. Could someone help please? I have never tried to use it before so I cannot tell whether it worked with previous versions.
I am using Natty.
Here is what I get with the command xrand. code...
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