Ubuntu :: Wired Network Not Working After Install
Mar 10, 2011
So after I installed there is a symbol up in the top right for a wireless network with an exclamation mark. I don't have a wireless connection so this makes no sense. now because it don't have an Internet connection my mouse drivers can't be down loaded so any help needs keyboard commands.
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Jan 15, 2011
My desktop computer has another Linux distro on it. Wired networking was working fine. I wanted to try Ubuntu 10.10 so I installed it on a spare USB HDD. After install, networking still worked on both distros.
I moved the USB HDD to my win7 laptop and Ubuntu 10.10 booted fine. Once booted, Ubuntu asked to configure wireless on the laptop. I tried to do this but it did not work.
Therefore, I moved the USB HHD back to the desktop and booted. Now the wired network does not work from either Ubuntu or other distro (fedora 14). And to top it all off, the wired network will not work even from the Ubuntu live CD.
I have checked all connections, switches & cat5 cables to my desktop computer. I can still access the network and internet from my laptop (in win7) so I do not believe it is an infrastructure issue. I can confirm that everything works from the cable out of the back of the desktop through to the internet.
Here is the output from the usual troubleshooting commands in Ubuntu 10.10 code...
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Oct 24, 2010
I did a fresh install of Ubuntu 10.10, coming from 10.04 and the wired network connection sometimes works, and sometimes doesn't. Right now I manually removed current network from System-->Preferences--> network connections, define a new one, and reboot. This usually fixes, although I've had to do this two times in the past.
Other general info
Ubuntu 10.10 64bit, EVGA P55 motherboard, on board either net.
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Feb 11, 2010
I can not get my network to work.Wireless shows no networks at all and wired the ethernet light does not even turn on. I have dpne heaps of searching but i can not seem to find a solution.
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Jun 22, 2010
I recently upgraded to 10.04 and now my wired network no longer works. I am unsure if it worked at all since the upgrade as that computer is rarely used, but it was definitely working prior to the upgrade. It is some sort of Realtec card, I believe. Does anyone have any suggestions? I'm running 32 bit 10.04 on a 2 GHz P4.
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Sep 12, 2010
I use Ubuntu 10.04. Last night, I installed the most recent updates for this istribution, and before I shut off my laptop, my internet was working smoothly. However, today my Internet connection is behaving very strange. When I try to connect to the internet, my browser times out or cannot establish a connection. I'm able to connect to low-input sites like Google search, but I cannot connect to sites like Facebook, Wikipedia, or even the Ubuntu forums (I'm currently using a friend's laptop to post this). Pidgin and Skype work without a problem, as well as Transmission. I primarily use Firefox, but I also tried Chrome, Opera, and Epiphany; none of them worked. Oddly enough, my update manager also cannot connect to the Internet to retrieve updates.
I have restarted my router, but it still works properly, as it is running fine on my friend's laptop. I have tried 'no proxy' in Firefox, but it did not help. I also disabled IPv6 in etc/sysctl.conf by adding the code:
#disable ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
[code]....
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Sep 1, 2011
I have not used wired network on my desktop for some time, and now it appears to be not functional. Wifi works fine.
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Apr 4, 2010
I'm new to OpenSuSE and have just booted up an Acer Aspire 4736z laptop with the 11.2 livecd. All of the specs (gathered from lspci -n) are available here: Debian HCL - Acer / Aspire 4736Z. Wired internet does not work. I have tried `modprobe atl1e` then `service network restart`to no effect. NetworkManager says nothing is plugged in (perhaps a hotplugging issue?). eth0 is listed in ifconfig.
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May 30, 2010
My wired network is not working! This is the result of ifconfig -a:
Code:
eth0 Link encap:Ethernet HWaddr 00:1c:25:3e:fe:50
inet6 addr: fe80::21c:25ff:fe3e:fe50/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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Sep 21, 2010
I'm not a total newbie, but run into some strange problems with my installation of Lucid.Everything was working fine yesterday. I shut down the laptop and powered it up this morning and had problems with network. I have two NICs (wired and wireless). Both are set to pick up IP settings from DHCP and both do, however when using wired network I can't communicate with outside world - can't even ping the default gateway (but pinging 127.0.0.1 or IP address of the NIC no problem, so stack should be OK).When on the wireless network everything works fine (otherwise I would struggle to write this post ).What is very weird though is that I have a VMWare Player installed and using Windows VM on wired network works just great!
I noticed that when you're persistent it happens that you can ping but huge chunks of traffic are lost (e.g. packet 1-10 would pass, 11-40 would be lost, 41-59 would pass and so on).I restarted Ubuntu, tried shutting down interfaces, disabling networking and nothing helped. I don't recall performing any changes (at least that I would be aware of).Can anyone suggest something?BTW. This is not DNS issue as both IP addresses and FQDNs do not work. When I refer to using a given network (wired or wireless) the other one is down with ifconfig command...
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Oct 22, 2010
It has been a while and many ubuntu updates since i connected the windows laptop, it used to work fine but this ubuntu machine keeps telling me the cable is unplugged. When i boot into windows XP the network works fine and the laptop can connect through the network to use the internet. I have a very simple home network ... 3 pc into one switch. I am by no stretch of the imagination good with networking
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Nov 30, 2010
I'm new to Ubuntu - I've decided to give Ubuntu Studio a go as an alternative to Windows. However, after installing it, neither of my network cards work. I have a Intel Pro Wireless 3945ABG wireless card, and a Broadcom Netlink Gigabit Wired card. Neither work, And I'm not sure how to. I've tried searching, and have come up with the .tgz file here, but I have no idea what to do with it I'm concentrating on the wireless card for the moment, seeing as that will be the main one I use.
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May 13, 2011
i have a dual boot system with xp and ubuntu 10.10 (which i recently installed). The internet works fine on my xp but on ubunutu it did not work.
i tried few things, like changing the proxy setting in mozilla firefox etc, but i did not work
i am attaching snapshot of ifconfig, resolve.conf and route-a commands for your referral
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Jul 18, 2010
I'm trying to do a minimal install via a USB flash drive. Everything was good until it tried to recognize my network (wired). It showed "No Network Interfaces Detected" (On Ubuntu and Debian). I wish to do a minimal install since I want to install the programs I want myself. Plus, I have a small flash drive.
I'm using an Atheros AR8151 PCI-E as my card (as shown by Windows). I also have a wireless, though I don't care much about that, wired will probably be easier. Through the command shell, I can see Ethernet Controller: Atheros Communications AR8151 v1.0 Gigabit Ethernet (rev c0). When I do plug the Ethernet cable in, I don't get the lights on during Linux installation but they do come on in Windows. If I need some additional driver, can I somehow add it to the minimal installation? I was looking through the log file and found that i82365 could not be loaded, a PCMCIA controller. I'm assuming this is separate from the NIC and interfaces between the bus and the NIC.
no idea whether it's because it couldn't find the drivers or because the controller was incorrectly identified. But I'm pretty sure this is why I can't get my network card to work.
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May 27, 2010
I recently installed Ubuntu 10.04 on an older PC and I'm having problems with the network card built into the motherboard. When I connect an ethernet cable into the ethernet port I get a solid amber light, and I can't connect to my router, (which is being directly connected). Nothing is shown in Network Connections, but on another PC with the same version of Ubuntu it shows "Auto eth0", and it works just fine connecting with the router.How do I fix this? I'm an Ubuntu noob so I'm not really sure what to do here.
The network card is an Intel 82547EI Gigabit LAN controller, and Intel's website offered a driver available for my kernel version of Linux. However I was typing everything it told me to do in terminal, (which half the time I have no clue what I'm typing actually means), but I ended up getting some errors towards the end of the install process. I'm not sure if I messed something up or the driver just isn't going to work.
I'm hoping there is an easier fix for this, I've been searching the net all night trying to find someone with a similar problem and I haven't found any. I think I have another ethernet card which I might pop in and see if that works....but I figure I'll most likely run into the same problem because I know for sure the motherboards network card works - has on Windows, I just can't get it working in Ubuntu.
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Apr 18, 2011
After i install it i lost my internet connection . i got a message " Wired Network " " you work offline ". i use cable ADSL ,.... my Pc information HP Pavilion 6700 running with both Window 7 & Ubuntu 10.10 note... my network connection work correctly on W7.
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Mar 27, 2011
My Suse 11.4 wired network is not displayed in the bottom panel inside of my networkmanager. I can connect to the internet It just shows a red box with a white x inside near my clock is there anyway to get this working?
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Jun 21, 2010
I have been looking around the forums searching for similar problems, it seems not only me had this problem. About a month ago I did a regular update via Upd Manager. The next day - no wired connection.Still managable, since the local library has wireless. Now that won't work either.Just after I upgraded from Jaunty, I accidentally removed NetwMngr from the top right corner of the screen, but that should not have anything to do with how the program works, right? I now cannot reach NM, if I run it from the terminal, nothing happens visibly.
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Jul 18, 2011
I can connect to the internet with wired connection. The switch for the device is on but this command "sudo lshw -C network" has the following results:
#
[sudo] password for nn:
*-network
description: Network controller
product: BCM4312 802.11a/b/g
[Code]....
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Feb 18, 2010
I have the problem with my notebook, that, after I used it at work, the network-manager always tries to autoconnect after boot. He has no cable network and so I get the message "not connected" after a while.how to tell the network-manager, not to autoconnect each time?
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Oct 30, 2010
I'm running Squeeze and I'm looking 3 days now for a solution in some weird problem. The NetworkManager Applet shows that there isn't connection although I am connected. The icon has this small "x" and when mouseover it says "No network conncection". Moreover when left clicking it, it says
"Wired Network Device not managed"
While I was looking for the solution a came across this post by an Ubuntu developer who says:network-manager-applet displays the connectivity state of network-manager's managed interfaces not every interface. So the title "network manager says disconnected but is connected and working" is actually misleading. The interface is connected and working but not from network-manager's point of view since it is not managing the interface. Additionally, in Lucid now network-manager applet displays nothing now for non-managed interfaces so is less misleading. You can check to see whether or not an interface is managed by network-manager by using the command line too nm-tool. You'll see "State: unmanaged" for unmanaged interfaces.
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Feb 14, 2010
Last night while setting up wired & wireless connection in openSuse 11.2 Gnome version via YAST's ifup, I got wireless but lost wired connection (interface eth0). Dmesg shows that eth0 became eth1. I cannot get eth0 back. Is there any way to remedy this situation, eg. get info from the Ubuntu partition in my triple-boot laptop, without having to re-install openSUSE?
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Feb 7, 2011
I tried to install Ubuntu 10.10 with the live CD and it kept freezing at creating ext4 file system for /. I finally got it installed using the alternate cd method. Now, my internet connection is not working. I am connected to a router with DHCP. When I boot up with windows, everything works fine. Ubuntu says that I'm connected with a wired connection but I can't access anything on the internet.
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Jun 16, 2010
I'm getting a little frustrated. My Ubuntu 10.04 has no wired nor wireless though i've got both. My computer is a Acer Aspire 5745G with atheros cards. i've been looking into this: Atheros but it doesn't help me when i've got no wired internet.I installed this: and it got the wired network working. So i figured that i'd run a update to see if my card would get any support. it didn't, and after i restarted my wired connection died too. I have reinstalled it sinceIf anyone knows how to do something 'bout this atheros card i don't want to do any working in windows, only games...
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Jun 18, 2010
I can get my desktop to connect to network on the router its plugged into.
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Aug 22, 2011
I have a script which runs periodically and copies some very large files from the server to my laptop. This works fine, except sometimes my laptop is not connected to the wired gigabit network. I want to prevent the script from running while on the much slower wireless network. Is there a conditional I can use in the bash script to test for wired connectivty? Something like if [ "$eth0" = "on" ];
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Mar 18, 2010
I have Ubuntu 9.10 installed on a VM Server 2.02 with a Win7 32 bit host. When the host is wired into my network, the Guest (Ubuntu) has internet conductivity. However when the host is connected via Wireless, the Guest Does not have any internet connectivity. The VM Network connection is set to Bridged.
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May 4, 2010
I recently did a fresh install of 10.04 from 9.04 and since then I am unable to use Internet. However my ethernet connection is working fine, as I am able to login to modem and check configuration. I reinstalled twice, downloaded fresh 64-bit & 32-bit and also followed kernel update steps as in few forum posts, but no joy. The firefox is throwing an error "The connection has timed out". My internet connection is working fine as I am able to use my Windows Laptop to post this message. I checked system > administration > hardware drivers and couldn't find any unsupported hardwares.I had similar issue when upgrading to 9.10, hence stayed on 9.04. When I looked at LTS image, I couldn't resist and cleaned up 9.04.
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Jul 7, 2010
using an Acer Aspire Revo with a MCP79 nvidia chip. After upgrading to 10.04 and getting a 2wire AT&T dsl modem, the revo wired lan will not work. I have a dell mini 9 and the wire lan works on it. Wireless works on both. reading the Ubuntu manual pages it seems that there is a driver problem, I need nfe driver. The explanation on how to add the driver talked about a loader.conf file. I think that was replaced in 10.04 grub2 with the /etc/grub.d/40_custom file.My question is if I add "if_nfe_load="YES" to the /etc/grub.d/40_custom file will it load the necessary driver?
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Aug 9, 2010
I dualboot Win7 and Ubuntu 10.04 for quite a long time now with no problems.... but now wireless works perfect on Win7, but I can't even connect Ubuntu with a direct wired connection.... ubuntu connects to the actual Linksys Wireless router just fine, but just won't take the internet, and I've tried two different Wireless cards.this all started (I dunno if its relevant or not) when I put in a new TV tuner, which I obviously took out right away. But the problem is still there. I don't think its the card, I'm pretty sure its just some kind of setting that I've messed up or something because when I connect to the network its near 100%.
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