Ubuntu Networking :: Computer Loses Internet Connection And Requires Many Reboots To Re-connect
Sep 5, 2010
I am using Ubuntu Studio 10.04 LTS and I am experiencing the following problem: my computer loses its Internet connection and appears to require several reboots to re-establish an Internet connection.
As suggested on a similar post relating to wireless connection loss, I supply the output of sudo lshw -C network
*-network
description: Ethernet interface
product: NetLink BCM5789 Gigabit Ethernet PCI Express
vendor: Broadcom Corporation
[Code].....
Note that I have REMOVED my wireless card in case there was some kind of hardware conflict or failure. I am using a wired connection through a Linksys WRT54G router that is supplying an Internet connection to another computer and an IP phone without any problem.
When I run the command network-admin (or select System > Administration > Network) I can see only 3 tabs (General, DNS and Hosts) It seems that the Connections tab has disappeared (and I believe this happened when I upgraded from Ubuntu 9/Karmic Koala). If I click Help it shows me that there should be 4 tabs, not 3.
The connection dropping began prior to my decision to upgrade. In fact it took several attempts to complete the upgrade. Should I attempt to re-install the upgrade? I am not sure how to do it without losing my connection. When I visit System > Administration > Update Manager, I am informed that my system is up to date.
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Aug 25, 2010
I have windows 7 dual-booted with ubuntu. Im having issues with ubuntu however and i am very new to using linux (sorry). When i intalled ubuntu and ran on it a seperate partition everything seemed to work fine until i tried connecting to the wireless internet in my university. This is what's driving me crazy. When i first turn ubuntu on it connects normally to the internet, and i can usually get onto google for 30 seconds. After 30 seconds, the wireless loses its connection and the internet shuts off, even though it can still detect the wifi in the area. I try to reconnect but it consistently fails... I also get some sort of .local avashi error message (dont remember what it said exactly) for a brief moment and then it fades away. Can someone tell me what to do? This is driving me crazy. btw, i have a realtek rtl8191 wlan nic driver installed on windows, so im assuming thats the driver installed on linux to. Do i need to install a different version like kubuntu or xubuntu?
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Mar 10, 2011
After installing 11.4, I need to type in the command to update the firmware for a broadcom wifi adapter. Then I needed to reboot, twice, before the system knew to use the adapter (where the adapter wifi light goes from orange to blue).
Then I needed to add my wireless network and type in my key. But the key does not take. If I click on my wireless network icon, it just re-asks for the key and does not connect nor give any other message. Network icon continues to display no connection.
So I need to reboot again.
When the system starts again, the adapter is blue, I click on the icon for my wifi network and it connects without asking for my key and I can then set to start my wifi by default.
Now my wifi works fine.
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Oct 21, 2010
I tried to install Xubuntu 10.10 Maverick as dual boot on my laptop. However when xubuntu is on, I can't find a way to connect to internet. When I try the 2 arrows on the up-right corner the option for wireless is deemed. I tried offline/online, that did not work either. when I click the firefox It says you are not connected.
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Nov 17, 2010
I have a computer running XP with a wireless Internet connection. I have installed Ubuntu 10.04 on a second computer. I would like to connect my Ubuntu computer to the internet through a wired connection to the XP computer. As I am a newby to Linux commands could someone explain how to do this in laymans terms.
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Oct 28, 2010
i have an ubuntu server box as my gateway and firewall. for days at a time itll run fine, then one or two days out of the week, it will drop connection often because it drops its ip addr. when renew an ip, itll work fine for about 5 minutes and drop again.ive tried different nics, different wire, my logs dont mention anything, my cron files dont have anything suspicious.
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Dec 2, 2010
I am in college and live in a dorm room. As a dorm resident, I have access to only one wired network connection and I am not allowed to connect it to a router. My primary computer is multihomed and I was hoping I could share network access (eth1) through eth0 to a router. Then I want to hook up my secondary system to the router. I am not using the WAN port on the router. I believe this makes it act like a switch, which seems to be what I want.Here is my /etc/network/interfaces file on my primary computer
Code:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
[code].....
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Apr 24, 2011
Like the title says, is there a way to restart the computer if the internet connection is lost?Is this possible on ubuntu?
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Jun 30, 2011
I am trying to get an internet connection on my newly-installed ubuntu computer.
i have tried <sudo apt-get install b43-fwcutter>. it responded <E: Unable to locate package b43-fwcutter>.
i then tried a <dmesg | grep -i firm>.
the it spat back at me.
[ 0.161805][Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[ 0.245165] pci 0000:05:08.0: Firmware left e100 interrupts enabled; disabling
[ 17.328521] Broadcom 43xx driver loaded [ Features: PNL, Firmware-ID: FW13 ]
[ 18.302783] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found
[Code]....
i read the instructions, but no downloads. and fast, too; caus if i don't set up my friends computer by sunday i dont get $50.
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Feb 24, 2010
Im posting after reading through a lot of articles explaining the same thing on how to share an internet connection from a computer with two NICs.
I have the following simple setup
When I first followed this guide
I was able to ping between the GW and a client on the LAN but couldn't access the internet from it. So I started to configure different things to get it to work which failed.
Now I can't ping between GW and the LAN. I tried to follow the same guide over again and even flushing the tables but still...
These are my current settings (without any chains).
(this client also has a wireless connection displayed in 'ifconfig')
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Mar 24, 2011
I am fairly new to linux. I have Ubuntu 10.10 on my Dell Inspiron E1705. While browsing my internet connection suddenly stops working. It says that I am still connected but the internet doesn't work. When I try to disconnect then reconnect it will not connect to the network. To get it to reconnect i have to turn of the wireless card, delete the connection then restart, turn the card back on and reconnect.
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Mar 6, 2011
I have so many _wired_ devices that I can't get by with just 4 eth cable outlets anymore, so I thought I'd hook up an older router that I don't use as a way to get extra places to plug devices into.
Now it looks like:
Internet
then cable modem
then router1/wifi + (1 eth NAT storage)
then router2 + 4 eth0 computers:
(legacy FC5 box)
(legacy F11 box)
(updated F13 box)
(windoze)
All of the computers EXCEPT the FC5 box are fine (my def of "fine" is I can ssh to and from the other computers and to outside computers, and browse the web).
The FC5 box, however, can ssh to and from computers inside the network just fine, but can't get any kind of web browsing. Nor can it ping to the outside. I get a "Network is unreachable" error. I'm not using a proxy, not knowingly, and my firewall settings haven't changed...it certainly hasn't been blocking port 80 before.
what's the best way to go about adding more ethernet when you need about 7 cables. I'm not really excited to buy a router with 8 ports or anything like that, especially when this seems to _almost_ be working just fine.
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Apr 22, 2011
I just installed the Natty Beta and plugged in a Netgear WG111v3 USB wifi adapter. It is using the RTL8187B driver and worked out of the box. The problem it loses my connection every few minutes. Sometimes not for 10 or 15, sometimes like a minute or less. After it loses the connection, I have to uncheck "enable wireless" (which I assume is the equivalent of bringing down my wireless interface) and then check it again before it will let me reconnect. I don't want to try ndiswrapper because the card works great when it works, including monitor mode and packet injection!
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Jan 9, 2011
I want to settup a proxy server who just redirect the internet connection to my second computer. I try Squid Proxy but its too complicated for me. Can you sugest me another more simple program to do what i want?
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Nov 1, 2010
I am going to a country with government managed firewalls. How can I connect to my home computer's (Ubuntu 10.04) internet connection from a computer behind these firewalls?
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Feb 12, 2010
I've been using this network forever With windows and I can't figure out how to connect to it now with ubuntu...I have a build-in wireless card and I know the name/password of the connection, but my computer cannot seem to locate it. I've looked through guides and none of them work..
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May 26, 2010
How to connect Ubuntu to the Internet through a broadband connection? I decided to give Linux a try, and I picked the Ubuntu variant. I have some problems with the Internet connection though. I have a broadband (modem-less) PPoE connection, and all the info needed in order for me to connect are the username and password (which I have).
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Aug 29, 2010
i just installed the 10.0.4 version. My problem is that I cant connect to the internet. When I add a new wireless connection, it says that its connected but i cant ping the router or connect to any websites. It keeps auto assigning me with a 10.42.43.1 ip which doesn't make any since because my router's is nowhere close to that.
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May 21, 2011
I bought my new Dell inspiron N1401 64bit laptop. It has windows 7 installed in it, I am begineer to linux. I have installed Ubuntu 11.04 64 bit version. I have a wired internet connection which works fine with my windows 7. When I switch to Ubuntu, when internet cable is plugged, the top right corner, network manager shows connection is established, but when I open firefox I cannot access internet. I tried searching on forums, but I could not make it work. If I type ifconfig command in terminal attached is the output I get, I dont know what is the problem. I want to use Ubuntu than Windows
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Jun 5, 2011
I just installed Ubuntu in my PC and I tried to connect to internet using broadband connection. I use a ADSL router with WiFi access point to connect with network and dial my username and password using my computer to connect to internet.I could so it easily on windows 7 from Network and Sharing center and Setting up new connection or network and connect to internet using broadband internet.How can i do it with ubuntu 11.04 ?
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Jan 28, 2010
Earlier today I decided I wanted to switch back over to ubuntu, my internet was working fine, but as soon as i reformatted to Linux my modem stopped showing any lights under ADSL - TX and RX. and I can't connect to my wireless connection anymore. What should I doooooooo
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Mar 3, 2010
I have just installed a fresh copy of 9.10 on an older Compaq nc6000 laptop. I need some help getting my Linksys WUSB600N wireless adapter to function properly.
I have "half-way" connectivity, meaning that I can see (and connect to) my home wireless network but I can't connect to the internet (unless I use the wired connection). I have installed NDIS wrapper - no change
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Mar 9, 2010
I am using WINDOWS 7, in which i connect to the internet through broadband connection dialer wich requires username and password,aslo i have another connection wich is used to connect to LAN. I hav recently installed ubuntu 9.10.. Now my WIRED connection is showing established..with eth1 and following are the outputs of some coomands which might help u to identify the problem..
[Code]...
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Mar 16, 2010
My friend is trying to share his clearwire connection with me using Windows ICS. Using network-manager or wicd, I am unable to connect to his share. I am able to connect unencrypted with iwconfig, to the ad-hoc network, and then use dhclient to gain ip address.
I am not able to connect to WPA encrypted share using network-manager or wicd. nm-applet crashes when trying to connect. I am attempting to setup wpa_supplicant, but haven't got it working yet.As usual, the wireless networking out of the box experience in Ubuntu doesn't work. This is extremely frustrating. If Ubunut's goals are to be the default desktop, then these guys need to get wifi that "Just Works"...
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Sep 7, 2010
I have an ASUS G50Vt laptop with Ubuntu 10.04 installed on it. I have a WiFi Link 5100 wireless device. I use these settings to connect to it:URL...My problem is, once I connect, within 30 seconds I lose my Internet connection. It goes on and off seemingly whenever it wants. Is there something I'm missing? Some kind of driver issue or something else I need to change?I can connect to the non-secure connections fine, just when I try to use the secure one it craps out. Halp?
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May 7, 2010
When using a Verizon UM150 aircard, it is quickly recognized in Ubuntu 10.04. It installs and connects quickly and seamlessly. After anywhere from a few seconds to a few minutes it disconnects and then disappears from the network manager. To reconnect I have to exit and reboot into Ubuntu. I suspect that there is a conflicting driver that needs to be blacklisted.
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Mar 6, 2010
I have installed fedora 12 recently. after installation i tried to connect to the internet using BSNL broadband connection. I filled in the details such as IP, Netmask, Gateway and even DNS servers. In the services also I ensured that the network manager services is on. However even though my computer cannot connect to the internet. I then tried the ping test of the modem from the address 192.168.1.1 and found that the ping test is successful. Then i tried the network administrator and there I noticed something unusual.
There are two options in the devices eth0 and eth1 thats ok but the unusual; thing is that the Activate (green button), Deactivate (red button) and even the delete buttons are in the background and I cannot select them. Isthis the problem for the network connectivity.
[Code]....
I then tried the ping test of the modem from the address 192.168.1.1 and found that the ping test is successful. Then i tried the network administrator and there I noticed something unusual. There are two options in the devices eth0 and eth1 thats ok but the unusual; thing is that the Activate (green button), Deactivate (red button) and even the delete buttons are in the background and I cannot select them. Isthis the problem for the network connectivity.
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Jan 11, 2010
I recently installed Ubuntu 9.10 on my Dell Inspiron 1545 64-bit laptop. Before that I used Windows7. In Windows, the internet connection worked perfectly well. But after installing Ubuntu, I am unable to connect to the internet. The network-manager applet finally says that "You are disconnected". When I do the "ifconfig", I got no IP address.
So, I installed Ubuntu 9.04 in the same system. But the problem persists.
I gone through many posts in this forum but nothing was useful.
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Feb 12, 2010
I have just installed Linux Mint 8 to an Asus A6000. My problem is that the computer won't connect with my wireless router. I have tried with MAC-adress and such, but still no respons. I also tried to connect with a cable to my modem, but no response there either.
I think I may lack some drivers, to what I think is Broadcom b43, but I am not sure. I tried to download the drivers on my other computer, and transfered them to the Asus. I managed to install 2/4 drivers, but on the two others, I get this message "Failed to fetch ... Couldn't reach archive.ubuntu.com"
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Apr 30, 2010
I installed Ubuntu (10.04) today and it has gone smoothly except for the fact that I can't connect to the Internet when in Ubuntu (connection works fine in Windows XP). I am using a wireless USB card (Linksys WUSB600N) to connect.
The weird thing is that the card detects all the local networks, asks me for a password to my network, and it even says it is connected to my network after I put the password in -- but when I open Firefox no pages will load.
There is another weird quirk as well: Ubuntu will not restart or shut down properly (it hangs around indefinitely with the little white / orange dots going across the screen) unless I first remove the wireless card from the USB slot. But that doesn't bother me as badly as the lack of Internet.
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