Ubuntu Networking :: Wired NIC Used To Work?
Jun 6, 2011
I'm running Natty and trying to troubleshoot my ethernet problem. An old laptop worked fine (including the ethernet) until a few days ago when we had a lightning strike relatively nearby. It appears power went out briefly or there was a spike (all hardware, except the DSL modem/NIC, had surge protection). The machine works fine now... except the network. I've run lshw -c network and it's showing "network: UNCLAIMED". ifconfig shows only the loopback and no eth0 at all. I've tried: ifup/ifdown, rebooting, live booting Natty off a USB drive, and tried on a network I know works... all to no avail. One interesting bit of info is that I can see a MAC address when I view the 'network connections' via the applet in top panel.
Am I reasonable to conclude the ethernet port got fried by the lightning? Any pearl of wisdom is welcome.
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Aug 24, 2010
I just started having a problem with my 10.04 laptop a few days ago, maybe Thursday, last week. When the computer is plugged into my home network (standard 192.168.1.1 sort of IPs) it works fine, but when I try to connect to my work network (130.15.90.XX) I am unable to pick up an IP. The router in my office is working fine, all the windows boxes can connect.
I've also noticed that when the computer is plugged in at work the notification icon for the networking indicates it is looking for a wireless connection (rather than the normal up/down arrows), even if wireless is deactivated
I can set a static IP in /etc/network/interfaces and everything works, so it seems to be a DHCP problem?
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Aug 7, 2010
when i'm connected with wired (eth0) to my access point vpn connection connect flawless but when connect with wireless (eth2) to the same access point vpn connection failed i don't know whats the deal. i try disable eth0 (ifconfig eth0 down). it's disabled now but vpn connection still didn't work
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Sep 9, 2010
I have installed Ubuntu 9.10 twice on two different laptops that had wireless cards that weren't working until I sudo apt-get update(d) them. After that, the wireless cards seem to miraculously work. But I was able to download them because they had working ethernet cards.
I'm working on a new laptop (Dell Inspiron 1150). I installed Ubuntu 9.10 like normal but I could not get a wired connection. I plugged in directly to my modem and it still cannot connect at all. It says that Auto eth0 is available, but it tries to connect but can't seems to make it. I downgraded to 9.04 to see if there was any changes, and there aren't. The same problem persists.
What's my next step to troubleshoot?
ifconfig:
Code:
lshw -C Network:
Code:
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Nov 10, 2010
I just got an iPhone 4 and cannot get wired usb tethering to work. I had the same problem with my old phone, but I was able to wifi tether it without jailbreaking and don't want to have to jailbreak to tether (I don't mind if it is connected via cable, in fact I prefer it).
In both cases, though gnome network manager connects to the phone, and though the phone shows a current tethering connection, the ubuntu system (10.04 Lucid) is not able to load any web pages, despite showing a wired connection, and despite the fact that connection information on this wired connection seems complete (even with an ip address from the iphone and as it did with my old phone). It seems as if there is likely some simple setting that prevents me from using a usb source, though that is a guess.
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Apr 3, 2011
I no longer have a Auto eth0 connection. I am running 10.04 and have not done any major changes. Here is my ifconfig -a:
Link encap:Ethernet HWaddr 00:1a:a0:97:65:a9
BROADCAST MULTICAST MTU:1492 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[code]....
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Apr 30, 2011
I recently installed ubuntu 11.04 after trying 10.10 for a while and never had to deal with wireless seeing as I always had it hooked up. but Now I am running it on my new laptop which has a Ralink RT5390 802.11b/g/n WiFi Adapter, and I am truly stumped on how to get linux to recognize it. Do I have to install a driver?.. plus, my laptop has the on/off toggle switch assigned to an 'fn' key, so it easily toggles on/off in Windows, but not in ubuntu.
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Jan 10, 2010
I have recently bought a new laptop for this purpose. It is a Toshiba L555D-103. It was pre installed with Windows 7 (64 bit). I have now installed Ubuntu 9.10 (32 bit). It works perfectly when wired. But it does not when I try it wireless. It did work wirelessly with Windows 7, and I have many more both stationary and laptops working through the router, so I do not think the router is the problem.I am guessing that there are no drivers for the wireless to function, but I am not sure. I am guessing that there are no drivers for the Ethernet card ?
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Jan 18, 2010
I recently purchased an Acer Aspire 1410 notebook running Windows 7 home edition. I installed Ubuntu 2.3 and my wireless and network LAN connection is not working. I saw on a link in this forum, someone was having similar problem. However, when i tried the solution that was recommended/suggested to the person, it did not work for me.
what I can do to get my wireless and wired connection to work?
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Feb 8, 2010
We finally got internet in our apartment in China, but my husband was the only one home when the guy came to set it up (on his windows machine).
He connects by plugging in, then clicking a desktop icon labeled "Broadband Connection" where a box pops up with a username, a password box, and some buttons, one of which says "connect".
I am trying to figure out how to set this up on my netbook so that I can use the internet at home too. I have a feeling that even if I had been home when the setup guy came, he wouldn't have had a clue what to do with mine anyway.
On the WinXP machine: Connection Properties state that this is a PPPoE connection, with TCP/IP, QoS, and Deterministic Network Enhancer all checked. Under the security tab, unsecured passwords are allowed.
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May 4, 2010
I installed Ubuntu10.04, It cannot driver Wired network and wireless. Later I installed linuxMint9, wireless is ok, but wired network doesn't work. I am sure the lan cable is ok. It works in Windows.
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Jun 13, 2010
laptop: averatec 6200 series
ethernet driver: SiS 900
wirless lan driver: rt2500
I got 10.04 installed and running pretty well.I cant get the wired ethernet to work but the wireless works. i did the the command line
[Code]...
also, dont know if i matters but ive got 8mbps/1.5mbps cable (motorala surfboard cable modem) and a linksys wrt54g wireless router.
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Jul 8, 2010
New to ubuntu, my wired and wireless connection doesn't work.
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Jul 24, 2010
Everything seems to be fine while she is connected via Wireless. When she plugs in the wired connection a problem occurs, it seems that every SSL Site and/or encrypted Website cannot be shown on her Notebook, for example shopping at Amazon.com. The Problem does not persist the whole time, sometimes it works for a few seconds and you are able to fill your cart.
Other Informations: The Connection has been tested with Windows 7 and with Ubuntu (USB-Live-Stick Lucid)... no difference.
Is it possible that her Hardware is not running correctly? What should we do next?
Tomorrow we want to reset the computer to factory default status.
Are there any possibilities of testing a SSL Connection using the Terminal?
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Jul 24, 2010
I have a HP Mini running Ubuntu Desktop 10.04, and I cannot get a wired connection to work. My network card is "Broadcom Corporation BCM4312 802.11b/g (rev 01)", and I have the restricted drivers for the card installed. Wireless works fine, though.
My /etc/network/interfaces:
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Sep 18, 2010
I recently tried out OpenDNS on my wired connection, however after it was slower than faster, I tried going back to the original settings that the connection had (so basically to Automatic DHCP).
For some reason the connection wouldn't connect again. So I thought I'd try deleting that connection and creating a new one, but this still doesn't work. When I try to connect using NetworkManager it just does the 'loading' icon for 30ish seconds then says disconnected.
My wireless still works fine however.
I'd very grateful as i'm worried i've messed up the ethernet port and I need it for when I got University in a couple of weeks
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Feb 14, 2011
what is the command to restart the network services? ive forgotten i think it uses -hup switch though. about 1 in 20 boots on my desktop ubuntu system results in the system insisting its no longer on a network yet has a fully functioning network card. a reboot always fixes the issue but that doesnt seem like a long term solution to me. If I ping a neighbouring system I get nothing. (sent packet count increases in ifconfig) If I ping from a neighbouring system back to my desktop I get nothing (no change in packet count) I can bring down and back up the network interface with no results. A sniffer shows the system definitely isnt sending anything out Everything worked previous boot and will work again after a reboot.
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Mar 21, 2011
I am having difficulties connecting to my router with my Ubuntu 10.04 laptop. Wireless works fine and I can get a wired connection when I boot into Windows 7. In Network Connections there is no Auto eth0 listing and when I create a wired connection, as soon as I enter details, the 'Apply' button grays out! Am I missing some permissions?
Here is some terminal output:
ifconfig
Code:
eth0 Link encap:Ethernet HWaddr 00:23:5a:d2:1f:13
inet addr:192.168.1.67 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::223:5aff:fed2:1f13/64 Scope:Link
[Code]...
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Jul 6, 2011
These days I wanted to connect to the internet on my laptop using a wired connection. When I inserted the ethernet cable, I was surprised to see that it doesn't work on Ubuntu 11.04. So I decided to boot into Windows and see if it works or not. And I found that it works without problems on Windows.
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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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Oct 11, 2010
I am unable to get my wired network connection to work. My laptop sees the wired connection, but will not connect. I am running 10.04 on aLenovo T400 with 3 gb of ram.
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Dec 6, 2010
My desktop PC has 2 NICs. I have Ubuntu on it since several years, and I remember that both eth0 and eth1 used to work. However, I discovered recently that currently only eth0 works, and eth1 is dead, but I don't know why. It's been a while since I've tried eth1, so I have no idea when exactly it broke. I suspect the problem may be related to the fact that the MAC address is incorrect: it is set to 00:00:00:00:00:00, which seems wrong. But I have no idea how this happened...Any idea what might be wrong and how I can fix it? Here is some output which I think is useful:
Code:
peter@cheetah:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:18:f3:68:42:78
[code]....
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Dec 14, 2010
today i installed ubuntu 10.10 on my hp mini 210 netbook. previously i had ubuntu netbook remix running and had no problem accessing the internet both wired and wireless; however, since installing 10.10 i have been searching for a solution for the last six hours but have been unable to get either to work.
as far as hardware is concerned i have a broadband bcm4313 802.11 network controller and am running through a linksys router which i know to be working because i have 4 other computers connected to it all with internet access. i checked ifconfig and a lo conection was listed but no eth0. i also tried downloading a broadband tar.gz driver but dont have any packages to build it and cant get any since the computer has no internet. i assume wired is easiest to setup so lets start there even though i use wireless 90% of the time. im new to linux so please dont expect me to know any terminal commands.
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May 1, 2011
I cant get my wired internet connection to work. The command 'dpkg -s pppoeconf' returns ' installed ok installed'. My connection is through a router which is probably in a semi-bridge mode and I need to dial a connection to get the net started. The connection Auto eth0 is setup properly with the correct cloned MAC Address (that of my laptop).
I've also executed 'sudo pppoeconf' and ran the whole series of steps which towards the end said that my connection will be set on boot. However, the net doesnt work directly and I dont know how to dial manually either. 'sudo ifup eth0' returns 'interface eth0 already configured'. I tried some 10-15 threads but none worked. Ubuntu is handicapped without internet.
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Jul 25, 2011
I have installed Ubuntu 11.04 using Wubi through Windows 7. It seems to be working but it will not connect to my wired internet connection. It tells me there is no wired connection, when there is. I used sysinfo and its not showing any network adapter or controller. I have a board with nvidia nforce go 430, could it be a driver issue. It works fine in windows though. Tried using a wireless adapter and all is working. But why doesn't the wired ethernet connection work.
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Jan 14, 2010
As of now, my internet works fine when connected with an ethernet cable.The problem is it doesnt seem like my wireless is working at all.The led light is orange, (its usually blue when it connects) and I cannot see my home dsl network.Is thereany specific troubleshooting steps I should take?HP dv6000 laptopwireless card: Broadcom Corporation BCM4311 802.11b/g WLAN
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May 2, 2010
My friend has 2 pcs, one connected to the internet and the other one used to connect (when he had windows installed) to the internet through the first one using internet sharing, now i installed ubuntu on both and the network between them has been created but it wont connect, the internet icons just animates for like a minute then says "wired internet disconnected" in other words it failed to connect.
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Jun 5, 2010
I have a Zotac Ionitx A-U. I can't get it to establish an internet connection with the wired ethernet within Ubuntu. The chip is detected, but trying to bring up the connection stalls out at trying to obtain a DHCP lease, like this:
DHCP DISCOVER ...
DHCP DISCOVER ...
No DHCPOFFERS received
Specs:
Ionitx A-U
Ubuntu 10.04 x64 kernel 2.6.32-22 (also didn't work in 9.10)
[Code]...
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Jun 20, 2011
i dosent get the wired network in my HP mini 2140 to work. It had worked before but today it stoped. I think it's the network card that is the problem. im running fedora 15.
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Mar 7, 2010
I got a problem about network proxy setting. With the graphics setting interface, I set auto proxy with the URL address but it is weird that the setting only work with eth1(wireless), doesn't work with etho(wired). however my wireless driver is always a problem for Linux. i also tried export http_proxy= XXXXX:8080 it still doesn't work at all.
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