Ubuntu Networking :: Wired Internet Stopped Working?
Apr 28, 2011
I had shut down my laptop at work last week and when I booted it up the wired internet connect was not working.The wireless connection is working (I'm typing now via wireless).I have WinXP Pro on this machine (but I've never used it--I'm all Linux now). So I booted into WinXP and turned off the wireless and got internet connection through the ethernet cable, so it doesn't seem to be the cable or my ethernet card.Here is the output of "ifconfig"
Code:
eth0 Link encap:Ethernet HWaddr 00:1c:25:7a:fa:b6
inet addr:xxx.xxx.xxx.xx Bcast:xxx.xxx.xxx.xxx Mask:255.255.255.0
[code]....
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Mar 20, 2011
I'm running 10.10 on a brand new computer, and up until this afternoon the wired connection was working fine. All of a sudden it stopped working (and doesn't work in Windows either).I ran sudo dhclient and it gave me:
DHCPDISCOVER on eht- to 255.255.255.255 port 67 interval 3 (7, 9, 10, 18, 13)
No DHCPOFFERS RECEIVED
No working leases in persistent database sleeping
[code]...
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May 26, 2011
I have been running Natty on my MacBook Pro for a while now and then suddenly while just using it normally (not installing etc), my skype crashed and would crash again on restart of the program. Now this could be a red herring, but though I'd include as much info as pos.
I installed all the updates the system told me to, to see if this would help and restarted.
On restart, the wired network would not connect. I get the following errors in my log:
May 26 12:46:40 richard-MacBookPro NetworkManager[763]: <info> Saved default wired connection 'Auto eth0' to persistent storage
May 26 12:46:41 richard-MacBookPro NetworkManager[763]: keyfile: updating /etc/NetworkManager/system-connections/Auto eth0
May 26 12:46:41 richard-MacBookPro NetworkManager[763]: Ifupdown: get unmanaged devices count: 0
[Code]....
ipconfig does not exist on my computer, otherwise I would echo this for you also.
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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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Feb 6, 2010
My ubuntu karma desktop is plugged into a wired connection that goes through a router and into my cable modem.Everything was working fine like it had been foseveral months yesterday morningSomething happened by the end of the day that has screwed up my wired networking. I plugged my laptop into the same cable thats plugged into my ubuntu, and the cat5 cable is live. Also when I plug said cable into the ubuntu box, the ethernet lights come on, or atleast a solid green one. Meanwhile the network connections Icon continues to have a red X and a tooltip saying "No network connection".
Under network settings, there is only one wired network "Auto eth0", but it says "last used: never" which is strange since I've been using this for months. When I click edit the main settings are MTU automatic, ipv4 automatic DHCP, and ipv6 ignore.hat could the problem be? By chance did a karma update get released that broke the networking
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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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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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Nov 6, 2010
Wired and wireless networking have been working flawlessly for years on my HP Compaq 6710b laptop. Several weeks ago, after an automatic update via the update manager, my wired network stopped working. I did not notice it directly, since my wireless connection took it over. I only noticed it when I had to work in an office where I didn't know the wireless password.Since then, I have been trying several things and searched several forums. It is hard to find any troubleshooting information about wired networking, as most of the problems seem to occur with wireless.
I did verify that there is no hardware problem. My laptop is dual boot and when I boot the other operating system, the wired network works without problems (as does the wireless.)My Ubuntu version is Ubuntu 10.04.1 LTS. My kernel version is 2.6.32-25-generic i686. I hope anybody can help me getting my wired network working again.
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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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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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Jan 31, 2010
After installing UNR onto my dell mini 9 and downloading the correct drivers to enable wireless internet (using this site: [URL]), I decided to load ubuntu onto my brothers netbook. After the installation completed, I went to do complete the steps listed in the above article, however I was unable to connect to the internet using an ethernet wire.
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May 24, 2010
I installed Ubuntu 10.04 into my compaq notebook. The problem is that I am not able to connect to my wired broadband internet.
Here are the details of my attempts so far:
1)"ifconfig -a" gave 2 devices eth0 and wlan0.
2)"pppoeconf" was unable to detect any ethernet cards.
3)Each time I plug in the LAN cable , the network icon would say "connecting" and ultimately result in "disconnected.Now in offline mode".My ethernet device is Realtek PCIe RT8101E/RTL102E (rev 02).
I also tried to install the realtek driver though I was not confident whether I did it correct.
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Jan 15, 2011
I'm running Windows 7 and Xubuntu 10.10 on a dell pc. My wireless works fine when I run windows 7, but on Xubuntu, the wireless doesn't even come as an option. When I try to plug in the wired connection, it loads for about a minute then tells me I'm disconnect. The option for the wired connection is there, but when I try to click it, the same thing happens. What do I do?
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May 7, 2011
Ever since my BT Hub 2 has updated a few weeks ago I'm unable to connect to the internet either wireless or wired. I duel boot on my netbook with xp and duel boot my desktop PC with windows 7. None of the Ubuntu�s are able to connect, I have no problems with the windows side of things.
Has anyone any ideas on how to fix this until BT decide to fix the problem. Preferably a step to step guide as I have limited experience with Ubuntu. I�m using Ubuntu 11.04.
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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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Feb 21, 2010
I'm currently running Ubuntu 9.10.After I updated to 9.10, my wireless connection stoppped working. I can access the network but I get no response or what so ever in my browser.Downloading language support or any software doesn't work either.Haven't changed anything to my settings and checked the router. Router works just fine.
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Jul 22, 2011
I am using Ubuntu 11.04 desktop. I a, using my internet through wifi and it was working fine but suddenly it start strange activities... like when I restart ubuntu it work for few clicks but then suddenly stopp even wifi is showing connected but I cant use internet.
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Apr 8, 2011
my Internet connection stopped working suddenly after updating the packages using synaptec package manager and rebooting it..can anyone say me why did this happen.BTW,mine is ubuntu 10.10 and i am absolute new to linux.I had to configure my n/w connections right from the scrap again
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Apr 24, 2011
running ubuntu 10.10 on a toshiba laptop recently the wireless Internet stopped working from our netgear router, it still works for the Ienova laptop and emachines desktop using the router but this laptop will not work wirelessly internet cuts in and out on this laptop when on wireless when it didn't previously do so it reads a connection but will not load up web pages unless hard wired in with an ethernet cord.
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Jan 8, 2011
im not quite sure how to succintly say what is happening. the general idea is that my internet stopped working and I dont know why. I have a netbook that i am using while i am backpacking through asia. it has both ubuntu netbook ed, and winXP dual booting on it. out of the blue, i could not aquire an ip address through dhcp. This was true in both windows and linux, AND true while using either a wireless or wired connection. ok, that is odd, but not a big deal, i will just set the ip / subnet mask / gateway / dns manually. After doing this the computer reports properly connecting to the internet (did the same tests and got the same results in both nix and winxp), however I could not do anything on the internet. could not ping, nor do a dns lookup much less anything else.
scraching my head I looked around the internet for a solution and came across 'netsh int ip reset' this is a command I typed into the windows command line. I'm not sure what it does, but it worked so far as now
[Code]...
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Sep 27, 2010
I'm running Lucid 10.04 on a Dell Studio 15. I first noticed it today, but it could have been happening for a couple of days. I get no IP address for my wired connection when running ifconfig. Wireless is connecting perfectly. Normally when I start up both wired and wireless connect and get a local IP address like 192.168.1.11*. Additionally, the router has a slowly blinking light corresponding to this connection, which is different from other good connections like my printer which has a solid light on. Here is output from running route -n:
Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
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Feb 8, 2010
i'm running Kubuntu karmic and i've been using a 3G Huawei E1552 modem to connect to the internet, everything was going well when suddenly my modem stopped working. I've tried reconfiguring everything, i even reinstalled kubuntu from scratch with no success.Here's a part of my /var/log/debug
HTML Code:
Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099883] usb-storage: device found at 7
Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099888] usb-storage: waiting for device to
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Sep 12, 2010
i installed ubuntu 10.04 in inspiron N4010 i am getting wirles internet. But wired internet is not detecting
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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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Sep 14, 2010
I boot up, internet doesn't work. What do I do? I get the internet icon with a read exclamation mark on it and by default "enable networking" is disabled. This is the second time it has happened to me.
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Dec 11, 2010
From one day to the other it crashed... So, I've deleted the link and when I try to install it again the PC failed to detect the device... But it works on windows... Even when I try to put my card on a device of the same operator, it works in a Toshiba with Ubuntu 10.10 but not on mine PC... I've an ASUS F3Sseries and all of the updates installed
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Dec 12, 2010
My brothers computer uses Ubuntu. All of a sudden the internet stopped working. So I did some research online and found a site that looked like it would work because the comments were good. I did what it said by removing the network manager and then i had to re-install it blah blah blah. Long story short his computer is still without internet. I tried to download the network manager on my computer and install it on his computer. I dont think it worked.If anyone could help me find the correct network manager to download for his computer and then help me get internet back onto his computer.
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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
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Jul 29, 2010
I use Fedora now for 2 days and all worked fine, but now I have a problem:My wireless internet doesn't work anymore. Normally I see a icon at topbar that tells me I'm connected but now it doesn't.I connected my laptop to my router directly and downloaded WiFi radar to see if that works. That program says: "Not connected".I'm sure the internet card is connected and the switch on my laptop is on. I only deleted BlueTooth, but I don't think that's the problem.
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