Ubuntu Networking :: Lost Wired LAN Connection After System Freeze?
Sep 23, 2010
I installed Lucid a week ago and have been having a blast with it after a two year break from Ubuntu (been using Mandriva). So the other day I went to hibernate the system and it froze. I naturally did a hard reset and when I log back in, no network connection. That is to say, the system tray says it's connected but there is no LAN light on the router or network card. ifconfig shows it's connected too. When I boot into XP (cringes) it works just fine.
No specifics ATM but the card is a D-Link PCI with a Realtek R8***** chipset
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Jun 27, 2011
So, when I booted up, the wired connection was automatically detected and in use. Whenever I suspend my computer and then resume it later I lose the wired connection. It is detected (seen) by Networkmanager, but I can never connect. I found a way to restore the connection, but it is manual and I was wondering if I could automate this process every time I resume. Details follow:
Laptop: HP dm1z, Natty 64bit. ethernet card:
Code:
#lspci|grep Ethernet
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
Likely culprit (according to dmesg)
[Code].....
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Sep 1, 2011
After I updated ubuntu 10.04.3 and restarted my PC, something weired happend and my wired connection was completely lost. I tried different things but it seems that I have lost my ethernet connection. I only have ethernet card and the interface was set to eth0 which is not recognized anymore.
The /etc/network/interfaces includes the following commands, which btw I tried to play with a bit by commenting and uncommenting the lines but was not helpful (but this is the original one):
Also in /etc/udev/rules.d I deleted 70-persistent-cd.rules hoping that it would be automatically regenerated but it did not,
Here are some messages I get :
lspci:
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Nov 1, 2010
I had some problems installing 10.04, which I'm not going into here unless I have to, but it appears to be up and running now except my PC can't access the network, even though it's wired. This is the first time I've tried putting on a new build by myself as my son always used to do it (my PC used to belong to him many years ago, and is old, like me.)
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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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Nov 26, 2010
Log file viewer also can't provide much help. I'm also affected by this issue that has been gone on my PC for almost 2 months, now. I've been forced to re-install Ubuntu ( from 9.04 to 10.04 ) countless time. As other users mentioned in their thread, the problems occurred randomly. Sometimes right after start-up, sometimes after 10 min to an hour of PC usage and sometimes no freeze at all. But the symptoms seems similar though on different component of hardwares. Me, myself, my PC always started to display freezing symptoms after 2-3 days of any Ubuntu fresh installations. The only way to re-boot are through RSEIUB/O ( and luckily I've never failed to do so ). Its just maybe took countless time of Ctrl + Alt + Del, before I could enter Grub menu and after that Ubuntu. Seems like that BIOS doesn't recognize HDD ( where the Ubuntu situated ), but oddly it ( BIOS ) only rcognize the CD/DVD drive . Lately, to overcome this HDD problem, I tried to pull out the SATA cable connected to CD/DVD drive and left only the SATA cable to HDD. And guess what, I've never encounter this unrecognized HDD problem for the past 2 days. I suspected the cause off all this issues are maybe the AsRock G31M-VS2 mobo that I've just installed about 2 month ago. But certainly, this issue never back me off my love to Ubuntu. As long its Open Sources.
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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 25, 2010
We had a power-out, which left my Ubuntu box off.
The modem & router is a friend's place, and it was rebooted. Both his boxes (Windows XP and 7) work fine.
but I can't get my box to hook back up. I've tried rebooting, unplugging cable to router from both ends (my box and router), rebooting his modem (Rogers' service) by turning off and on power supply for 3 minutes (as recommended by Rogers).
Once I got the Network-auto to show in the dropdown menu (I have a radio symbol on panel across top), but not again. I tried adding and editing a network connection (both wired and auto) but neither works, and if I boot unconnected they disappear.
The only thing I can get to show is a black box to the right on the desktop that has a red x and says Network Disconnected.
Me and friend are both frustrated as I don't want to interrupt his working use of internet to fix mine.
I have never understood how to connect to internet really, but it seemed to have solved itself in the past.
There is no password on the router, and we are not using wireless (which we never got to work).
The Rogers Modem is a "Motorola Surfboard" (Black).
The router is an Airlink 101 super-g wireless router.
My machine is a p4 motherboard with builtin ethernet socket on back.
My Ubuntu is I think Karmic 9.1
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Sep 16, 2010
I'm using RedHat Linux. In my friend system have Winxp. I have 2 LAN Cards. I'm using wired Broadband internet. So i want to share my internet connection to my friend system through another one LAN card. How can i do this
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Jun 16, 2010
I have a server which is located in the basement. The server exports a few directories which I mount on my desktop using NFS. From time to time, the connection gets lost. The server is also not always on. I can't change that part, so I worked out a script which notifies me when it's going down, and when it's back up again. It also mounts everything back.However.. As soon as I loose the connection, my desktop seems to be gone. KDE doesn't work, but I can use a few applications like Konsole, google-chrome, firefox, stuff like that. But the plasma-desktop around it hangs.
As soon as the connection gets back again, everything works. I have this issue only when my desktop is running while I loose the connection to the server. If it's down when I start my desktopworks properly. Unless the server comes alive, the nfs directories are mounted and the connection is lost again.I'm not really sure if this is a networking case, it could also be KDE related, but I figured this was the most reasonable place to put my topic in.My hardware:
linux-bbdu:~ # lspci
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 02)
[code]....
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Dec 10, 2010
Running Ubuntu 10.10 on a Dell 710m. Fresh install of OS yesterday. Initially I had wired connection but no wireless. So I started chasing threads & trying different downloads & commands [WITHOUT KNOWING essentially what I was doing; throw your rocks at me HERE] & now I have lost the wired connection also.
Also:
[a] If I go into System > Administration > Additional Drivers, I get "No proprietary drivers are in use on this system."
[b] As far as being able to copy a downloaded driver [using a working M$oft machine with net connection] onto an SD card & transferring that driver to the Dell laptop, I have tried formatting 3 different SD cards with the Dell, & each time I come up with various failure errors--& I have no idea why something as simple as formatting an SD card isn't working.
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Jul 30, 2010
I have installed Lucid in a new laptop. Things are running OK except for the following problem:
I connect to the network/Internet using Wired ethernet (TCP/IP) with static IP. Everytime I reboot/restart my network configurations are lost and I have to re-configure. I have googled this problem and have seen a few posts/bugs in launchpad etc. for what appears to be the same issue...but unfortunately I am not getting a clear solution to this problem.
Just for clarity, I am using the following commands to re-configure my network everytime:
Also note that I have already tried editing the /etc/network/interfaces and the /etc/resolv.conf files. But it seems that these are not being picked or are being overridden.
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Jun 1, 2011
I just installed Ubuntu 11.04 desktop on my desktop in dual boot with Windows 7.
Heres my problem, I am unable to connect to the Internet even though my wired Ethernet connection says it is connected normally. The wierd thing about this is that I also have a wireless card in my desktop and when I connect through that I am able to connect to the Internet. I am connecting to a router that is functioning as a repeater to my main router/cable modem. I have tried to solve this myself but am having no luck. Ironically, earlier today suddenly my ethernet connection worked for a few minutes without me modifying anything.
The output of some terminal commands are below.
Quote:
Quote:
Quote:
However a pint to that ip address (my router) is successful.
Quote:
Hosts.allow and hosts.deny are both fine (not blank but no entries)
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Jan 22, 2010
I have two PCs one has Windows XP the other has Ubuntu 9.10 on it, the Windows PC has no problems getting on the Internet (I'm posting this with it) and getting an IP address from the wired router. The wired router I have is ONLY wired it does not have wireless at all, it is currently setup to hand out IP addresses between 192.168.1.2 and 192.168.1.254.
The Ubunutu 9.10 PC worked great last night surfed all over the place for hours, then finally shut it down last night when I went to bed, shut down appeared to be normal like it always does when it shuts down, then this morning when I booted it up it gave error: "WIRED NETWORK - disconnected you are now offline".
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Mar 15, 2010
I am using ubuntu in my new office, and I can't get the network working. The "official" OS installed was a Windows, and it has a special "dial-up" app for the LAN connection (not wireless). My network admin is apparently not helpful, since he actually knows nothing about the internals for the "dial-up" app (he did not even ever heard of TTLS, PEAP, MD5, etc), and claimed that no OS except for Windows can work...
Well, I have tested various configurations with my Mac laptop, and apparently the LAN connection requires 802.1X authentication, and it's using a very weird combination "TTLS+PEAP+MD5" (if I check these options in Mac OS X, the connection works). However, in NetworkManager, I can't select both TTLS and PEAP, and moreover, TTLS does not work with MD5. So, is there anything I could try?
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May 17, 2010
Fresh install of UbuntuStudio 10.04. This is really bizarre.
I can't seem to connect to the wired connection mainly because there is no connections tab (pic attached).
Here's some printouts:
dmesg:
Code:
lshw -C network:
Code:
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Jun 1, 2010
When I unplug the ethernet cable from this laptop and plug into my Ubuntu 9.10 Desktop I get a wired connection automatically but I have no internet connection in Mozilla
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Aug 17, 2010
I've had a computer running Ubuntu connected to my TV for a few weeks now, but as of yesterday, I can't get it to keep a connection to the Internet. Everything works well for an hour or so after a reboot, but then no WAN connections work. When this happens, no sites load in Firefox or Chrome, I can't ping Google, I can't SSH to the box from work, and none of the pages I have running on apache load from remote computers. However, all local area connections seem to work fine. SSH from within my LAN takes much longer than usual, but it does still connect.
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Sep 1, 2010
The situation is I have one machine just installed 10.04yesterday, and I plan to take it as FTP server sharing filesvia LAN and WAN as wellBut after setting up all network withNetwork-Manager found that my dsl connection willdisconnect while my wired connection was connected.
my network-manager setting process is:
1.wired tab:
IPv4:192.168.1.x
[code]....
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Nov 1, 2010
I have a wired problem in Ubuntu 10.10, My Ubuntu can connect with Wireless network, however it cannot connect to Wired Connection. I installed dual System, one is Ubuntu 10.10, the other one is Win7. Under Win7, I can both connect to the Internet in Wired or Wireless mode.
The more wired phenomenon is: When I plug in the cable, I can see the icon connected in my network manager. But I cannot visit any URLs. By checking the "ifconfig -a", I can see the IP addr was assigned to my eth0.
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Nov 19, 2010
connect to wired LAN in ubuntu 10.04? I think I have specified the IP address and everything correctly. But it says no connectivity. In windows it says connected but I am unable to open any webpage.
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Dec 4, 2010
installed Ubuntu 10.04 on my Dell 1564. My cabled netwo connection is not working.buntu has been dual booted with Windows 7. Internet connection on Windows is working. I have an ADSL modem connected to my laptop via the cable.I have given the details of commands asked to be execute(viewed various posts).
isr@ISR:~$ lspci
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 12)
[code]...
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Dec 16, 2010
I recently did a whole system wipe and got rid of windows all together!! Unfortunately, that means I have to start over with the whole networking thing. I know I have a bcm4311, but I have no idea what I have for a wired adapter. I know that I could search through everything to find what I need, but there is so much info for all the different versions. I have ubuntu studio. Can someone tell me the commands to type into the terminal to find out what I have for the wired network card and recommend a place to get the proper "drivers" to get my computer working again?
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Jan 7, 2011
Running a wired connection through a Linksys router that suddenly stopped working today.I thought this was a ipv6 issue sinced I enabled some of those settings to share a connection with my PS3.I have since disabled IPv6 in Firefox and through the grub. The RealTek adapter will not even show a connection through the network manager when connected.The onboard adapter will show a connection, give me a ip address and MAC but still will not load the internet. I've tried uninstalling and reinstalling both adapters through the network connections, as well as reinstalling Firefox to no avail.I've also tried using Open DNS servers.I cannot ping through the network tools either. Hard for me to paste a ifconfig since I'm on my laptop.I'm running Ubuntu 10.10 (not dual booting).I did some updates this morning but it worked fine for a little while after that, until I tried to connect to my PS3.
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Apr 19, 2011
i got wired connection using Ubuntu 10.10 and im new using ubuntu pls tell me where i must write the words not to write codes and i don't where i must do it.what is the best version of Ubuntu didn't had that problems?as i saw that Ubuntu 10.10 had same problem for all people.
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Apr 20, 2011
i can't connect to the wired connection, but i can connect to the wireless... i'm using Ubuntus 10.04. when i run this codes into the terminal it shows:
root@valdivia-laptop:/home/valdivia# sudo lshw -C network
*-network
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
[Code].....
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May 4, 2011
A while ago i attempted to use ubuntu as my default operating system and it failed, i could not get the shares to work properly and i gave up. Yes i know, may be i should have kept going.
Any way, my problem is, Im attempting to use ubuntu 11.04 now, and this time i am realy keen on going through with this, however... for some reason when i connect my wired connection cable ubuntu keeps failing to connect. this is with the auto eth0.
Can any one help me with this problem? This is one of the major things that i will need to do if i want to switch over to ubuntu.
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May 6, 2011
So I had 11.04 beta and after the official release I updated,rebooted and lost all wifi and wired connectivity.
On an Inspiron 9300
lshw -C network gives
*-network:0 UNCLAIMED
For my Broadcom BCM4401-B0 100Base-TX and *-network:1 DISABLED For my wirless interface Intel PRO/Wireless 2200BG
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Jun 20, 2011
I'm running 11.04 on a Toshiba Satellite L350, and recently (well, for the past couple of weeks or so), I've been unable to connect to my network via a cable, only with wifi.
It isn't that it's unable to connect, it just doesn't show up in Network Manager.
My housemates, who run Windows, have no problems, so it's obviously something on my end...
Edit: I also tried connecting using wicd, but that doesn't detect it either.
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Sep 1, 2011
I recently installed 11.04 on my PC (was running 9.04), and beforehand "tried it out" and networking was fine. I could access the internet no problem.I then ran the install, and fully formatted my HDD (i have 1 HDD for the OS and another for storage)It crashed halfway thorough, so no problem, i just re-formatted the hardrive and installed.However, It didnt connect to the internet, I literally tried every single forum looking for the solution, including editing the Network interface file.After a bit of diggingfound my user privileges did not allow me to connect to ethernet, and randomly use audio devices.SO, no problem I checked the boxes, but it still wont connect to the ethernet now, and it was fine before, tried re-installing twice with full format, but still doesnt work.
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