Ubuntu :: Wired Connection Sometimes Lost Connection?
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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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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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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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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Feb 21, 2011
im on node1 when i type the command ssh node2@ip the terminal hangs up a bit then an error message stating that connection timeout but here is a thing: i cant ping to node2
but i can terminate the ping manually using ctrl+c when i terminate the ping usual message appears stating 10 packets transmitted, 100% loss
ps: when i go to node3 and ssh to node2 it works fine and also i can ping from node3 to node2 very fine. and the firewalls are down at all nodes -all wired connection over a switch
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Sep 22, 2015
The situation: The office has a WiFi network on one DSL line, which is used for our VoIP call center, and a wired network for our internal network and the majority of web surfing/traffic . Part of the office must be temperature controlled/monitored - we have a rather nice digital thermometer which is WiFi enabled.I have a Debian Wheezy box with a WiFi card and ethernet connection
What I'm trying to accomplish:Connect wifi enabled thermometer to WiFi network so it can automatically send temp updates (currently I have to do it manually via USB)Have the Wheezy box accept the downloaded file then send it to a back up server in the wired network
Side things that may be useful : Prefer to use wired connection for internet and apt and suchWiFi connection will really just be used for connecting to the thermometer
This [URL] .... topic got me thinking that there might be a way to bring the two networks together, but I don't know if that will wreak havoc on things. I know, the Windows and Mac OS don't like having ethernet and wifi at the same time, might Linux be better for this?
v&n had this to offer in the prior thread [URL] .... which I'll be doing more research on.
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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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Jan 11, 2010
I have been trying to connect to the internet with a wired LAN connection for a while now with no luck. Running version 8.04 LTS on a 32-bit desktop. Interestingly, my 64-bit desktop running version 8.04 64-bit automatically connected to the internet with no problems or input from me. Both are connected to the same router.
I figured i'd try and copy the network manager settings from the 64-bit machine to the 32-bit machine, which involved setting an automatic configuration (DHCP}. All went well except no DNS server address showed up on the 32-bit system, despite there being one on the 64-bit system. Trying to run Firefox like this results in the 'page load error' page coming up immediately.
I then manually added the DNS server address from the 64-bit system to the 32-bit system, and all that did was prolong the time it takes for the 'page load error' page to appear.
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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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Feb 11, 2010
I just installed ubuntu 8.10 on my pc. Before was XP installed. I formatted the system and installed ubuntu. Installation was successful. Problem is that I cant connect to network. My network card: realtek 8139 ethernet card
On ifconfig I get:
Code:
eth0 Link encap:Ethernet HWaddr 00:16:76:af:23:b3
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:23 Base address:0xb800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:502 errors:0 dropped:0 overruns:0 frame:0
TX packets:502 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:31896 (31.8 KB) TX bytes:31896 (31.8 KB)
Also the connection is wired one with modem only it's reliance broadband. The wire is connected between modem and pc but there is no blinking of light for this connection. The wan is active and wan's light is blinking and when I was on xp on same pc there was no such problem.
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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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Sep 9, 2010
i have just installed ubuntu 10.04 on my laptop hp 550.after i finished installation i connected to internet via eth0 wired connection normally and everything was fine...after about 1 hour i had no internet....i try restart but is the same problem....this is strange because my eth0 says connection established and when i open mozilla i cant open google either..when i ping [URL] it says "cant resolve "
my internet works fine in windows so what should i do to have back my internet on ubuntu...i cant do anything else in ubuntu if i have not internet and i like very much ubuntu so
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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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Nov 27, 2010
I just installed 10.10 on a desktop machine, dual boot with Win XP. Everything went well, it connected and did all the system updates etc. Then one time I rebooted and it wouldn't connect. I've tried rebooting again several times, tried unplugging the modem/router from the power and from the computer then reconnecting everything and starting it up again, no joy. I booted from the Live CD and it connects without any problem, likewise from Win XP. My Network Connections shows 'Auto eth0' and below is the ifconfig output.
Code:
jim@ubuntu:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:13:8f:b8:ad:fc
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:42 Base address:0x6000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)
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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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Apr 30, 2011
I power on my computer, it is no wired network connections.
I tried command ifconfig and lshw -c network . it could find the network card eth0.
Quote:
Quote:
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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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