Ubuntu Networking :: Wireless Loses Connection Then Will Not Reconnect?
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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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 23, 2010
my wireless will connect to a well known connection but will sometimes drop the connection then tries to reconnect. Sometimes it will reconnect w/o a problem but most times it will fail and when it fails it will refuse to even recognize that same wireless connection.
If by a small chance it does recognize the network then when you click on it, it will ask you again for the password, which is already saved onto the computer. After entering the password it will try to reconnect, then fail.
Only solution is to reboot.
I was wondering if there was an easy temporary fix of just reloading the software that controls the wireless.Such as, my audio doesn't work when I boot. I need to reload the ALSA driver using sudo /sbin/alsa force-reload
Is there something specific to the wireless that I can force-reload and it will start working w/o having me reboot my PC?
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Sep 8, 2011
I have problem with my wireless GSM connection , my notebook has built-in Toshiba (in fact Ericsson) F5521gw wireless modem , it is detected and usable by default without installing additional software.Problem is that I can connect flawlessly only once after switching on notebookif I disconnect manually I'm not able to connect again, i have to reboot my computer or another solution which allows me to reconnect is closing and opening lid (putting notebook in suspended state)I'm using Toshiba Tecra r850, openSUSE 11.4 x64 on Gnome 2 DE, using NetworkManager and nm-applet /var/log/messages after using disconnect from nm-applet:
Code:
Sep 8 17:04:39 linux-b5nl pppd[9933]: Terminating on signal 15
Sep 8 17:04:39 linux-b5nl pppd[9933]: Connect time 243.2 minutes.
[code]....
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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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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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Apr 18, 2010
Recently I've installed Ubuntu 9.10. I have DSL connection so, I wrote all details needed. After trying to connect on it, it automatically disconnects and connect auth connection again. I have worked on 9.04 and older versions and used to work very good, also the internet connection, but not in 9.10.
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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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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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May 26, 2011
I'm having a problem with the wireless on my Asus EEEPC 1000HE using Ubuntu 110.04. Digging into the laptop forums, it says there is a problem with wireless on some models of the 1000HE, but it is not the same wireless device and my wireless problem doesn't seem as bad as listed, so I think it's a different problem. But my problem is that if wireless drops for any reason, it will not start working again unless I either reboot the computer or click the wireless icon in the systray, click disconnect so it stops flashing (like it's trying to reconnect) and then suspend my computer or log off and back on. And it only does the latter because I added a file located at /etc/pm/config.d/00sleep_module with the one line that reads SUSPEND_MODULES="rt2800pci" (my wireless driver) So that one line seems to cause wireless to get a fresh connection after suspending (or something. I'm not a very advanced LInux user). I've tried running the command "sudo/etc/init.d/networking restart", but that does nothing for me. I'm not sure what other command to try to see if can fix it.[URL]
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Apr 21, 2011
Running 10.10 on Hp dv2000. Approx once a day wireless asks for password authentication but cannot re-connect to wireless network. I verified connection, correct password and modem & router functionality but still will not re-connect. After re-boot problem is resolved for another day or two.
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Mar 3, 2010
Sometimes I am unable to reconnect to my wireless AP using the same settings that worked the previous day, and that has me stumped. I think it's due to me switching access points (using different authenticatin) since the last connection.
1) After I enter iwconfig/iwpriv commands to connect my wireless usb card (edimax) to my WPA2 network, what process performs the negotiation with the AP, and is there a way to see status debug messages from that process so that I can see if there was a successful negotiation? (so I can see if the password is correct, etc).
2) Is there a way to manually invoke that process to re-attempt to negotiate? Or must I assume that happens automatically with any iwconfig/iwpriv command?
3) Is there a simple command that will erase all iwconfig/iwpriv settings so that I can start over with my iwconfig/iwpriv commands?
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Aug 17, 2011
I am running a version of Ubuntu 10.4 with XFCE loaded (actually Qimo, a distribution for kids). I am using a pci wireless card with a broadcom 43XX chipset and WPA2 authentication using the Broadcom STA driver. In an account with privileges I set the auto eth1 (which is what my wireless card comes up as) to connect automatically, and make available to other users.
When I switch to the kid's account, the wireless connects just fine. Then, if the computer is not used for a period of time, the powersavings mode kicks in. When the computer is woken up, the wireless connection does not attempt to reconnect. If you right click on the networking icon it doesn't even show any available connections, even though it can be found by clicking edit connections. The only way I can get it to reconnect is to restart the machine (I will admit that I did not try to restart the networking service, I will try that tonight).
Any ideas? This has been driving me nuts for a few days now. The users during the day are non technical and can't deal with these kind of issues. I can post more details about the setup (as recommended by the sticky post) tonight. I am at work at the moment and can't get to the machine from here - because it has removed itself from the network again.
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Jun 25, 2011
Wife's laptop has AR5001 Wireless Adapter laptop model is Toshiba Satellite A215
Problem : Wireless networking randomly loses connectivity and can not regain connectivity, the only apparent solution is a full power down , this is not even certain to work. The card works under Windows, she hates Windows. (I love her for this) I know it's not faulty hardware , because it will work for days on end under Windows without problems.
Things I've tried : madwifi drivers (any and all versions available) : These increase stability of the signal and seem to delay the inevitable however it still happens. When using these drivers the only option is to unload them modprobe -r then reboot then remove them again and re add them. It makes no sense why this works, and if I don't remove them prior to rebooting it will not work.
ATH5K drivers : These are pretty much junk, results are unpredictable at best, sometimes it will work perfectly for a few hours, sometimes it will not work at all. Nothing is repeatable, I can't seem to force whatever condition is causing this. rfkill does not show the wifi being blocked (hard or soft), unblocking it anyway does nothing, only way to make this work and it's iffy is to fully power down wait 5-10 minutes turn it back on and it MAY decide to work.
Firmware update : Updated the Toshiba BIOS to the latest version of the firmware 2.0 no joy here either. Same issue both sets of drivers.
Tried different distros and kernels : I've tried Mint 9, 10 ,11 ; Ubuntu 10.10, 10.04 , 9.10 and 11.04 (which is currently installed) , Fedora and OpenSUSE. All are giving the same problems. I have also tried a slew of different kernels no joy from any of them (I'm not at the computer with the issue now I will post exactly what kernel versions I've used when I have access to the machine).
Another useful bit of information, the hard switch to disable/enable wifi WILL disable it but turning it back on does absolutely nothing. The hotkey does nothing at all. The bios does not have an option to disable or enable the wireless card.
I will also post the typical lsmod , lspci , iwconfig all that good stuff when I get back to the computer in question. I'm probably just going to buy a PC card for it and give up on that one, but this is driving me insane and I would really like to see it resolved even if I do replace the hardware.
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Mar 1, 2009
I am setting up a fresh Fedora 10 install on an older computer for a roommate and have one odd little problem, everything else appears to be working just fine.
The network connection drops after about 2 minutes (somewhere between 90-120 seconds). This only happens in the installed Fedora 10; it does not happen at all when I boot a Kubuntu LiveCD.
Here's what I know:
The machine is a Dell Dimenision 4500, 2.0 GHz, 512Mb ram.
The ethernet card is 21x4x DEC-Tulip compatible 10/100 Ethernet.
Unplugging the ethernet cord and plugging it back in allows the network interface to come back up, grabs the right IP, but only holds it for another two minutes.
ifconfig and route show all the right info while the connection is good, but inet disappears once it goes down.
'ifdown eth0' and 'ifup eth0' do not bring it back up.
Is this a driver issue perhaps?
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Oct 24, 2010
I have Vortexbox (fedora distro) installed on a laptop which I am using as a media server. I would have issues where I thought the laptop would go to sleep and disconnect itself from the internet. The computer boots in command line mode and what I would notice is that the screen would go blank and then I would have to go to the computer and jiggle the trackpad and it would wake up. I posted about it and got responses related to the gnome desktop which I could not find the files referred to in the answer.
I tried using setterm to keep the computer awake setting blank to 0 and powersave off. The same thing happens even with the monitor on and the screen display on. A gesture on the trackpad seems to wake the ethernet back up. Here's my old post: [URL]. Everything else about this situation is perfect. Vortexbox is easy to set up and it does everything I want, DLNA, streams to my squeezeboxes, etc, but this ethernet cutting out is exasperating.
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Sep 28, 2015
I use Debian Jessie 8.2 and I am using a 3G connection using this modem => [URL] ....
The 3G connection works fine, except after 24 hours the connection drops and I cannot reconnect. If I reboot the computer, the connection will work again.
My guess is that my ISP gives me a new IP address after 24 hours and somehow my system cannot handle it.
How can I reconnect my 3G connection without rebooting?
I have already tried the following commands:
Code: Select allsudo service network-manager restart
Code: Select alldhclient -r eth0
dhclient eth0
Code: Select allsystemctl restart ModemManager
Results of journalctl and grepping my connection name (SFR)
Code: Select allsept. 22 17:58:19 ark1 NetworkManager[512]: <info> Policy set 'SFR Web / Prepaid 1' (eth0) as default for IPv4 routing and DNS.
sept. 23 18:17:07 ark1 NetworkManager[9446]: <info> new connection /etc/NetworkManager/system-connections/SFR Web * Prepaid 1
sept. 23 18:17:08 ark1 NetworkManager[9446]: <info> Auto-activating connection 'SFR Web / Prepaid 1'.
[Code] ....
As you can see sept 22 at time 17:58 is when the computer started up. And roughly 24 hours after it failed to reconnect.
Also I should mention that there is a script to run the command:
Code: Select allsudo service network-manager restart
if the computer cannot ping a server, ie if the connection is lost.
More journalctl info when the system tries to reconnect:
Code: Select allsept. 23 23:52:53 ark1 NetworkManager[9446]: <info> Auto-activating connection 'SFR'.
sept. 23 23:52:53 ark1 NetworkManager[9446]: <info> Activation (ttyUSB0) starting connection 'SFR'
sept. 23 23:52:53 ark1 NetworkManager[9446]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
sept. 23 23:52:53 ark1 NetworkManager[9446]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
[Code] ....
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Mar 28, 2010
A friend who switched ISP's gave me his old Linksys WRT54-G wireless router. I went through the installation procedure and had a wireless connection up and running - smiley face. I had security set up for WPA, and decided to upgrade it to WPA2. Another smiley face. When I went to connect (had already done so successfully), I noticed it referred to my wireless as Linksys - I was expecting to see the SSID. So I started playing around in Network Manager and now I have things all effed up.
Don't know exactly what I did, but now I have no wireless. So I ran a few commands (lshw -C network, iwconfig, ifconfig, and iwlist scan), and looking at the results I see what appear to be inconsistencies in the output. I've posted them below, and make the following observations:
1. Under the lshw it refers to my wireless connection logical name as wmaster0, and has the correct MAC address, etc.
2. Under the iwconfig it says, 'wmaster0 no wireless extensions', but then refers to wlan0 as the wireless connection (although it does not seem to be running).
3. Under ifconfig I see both a wlan0 and a wlan0:avahi. The wlan0 has no IP, the wlan0:avahi does, but it is incorrect.
[Code]...
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Mar 18, 2011
I've run into a strange problem on one of the servers I maintain. It's running CentOS 5, fully up to date. The server has Monit installed via RPMforge, and runs Postfix as its MTA. Every day at about 4:20am, when cron is running, Monit loses its connection to Postfix. As far as I can tell, nothing is actually going wrong with Postfix and it's always restarted just fine. I run a couple of Debian servers with very similar setups, and the problem does not occur on them.
Perhaps related, other daemons on the CentOS box often lose their pid files at the time when cron runs, which results in Monit thinking they're not running. One service in particular (zarafa-dagent) is so bad for this that I've had to completely disable monitoring of it in Monit. Again, this problem doesn't occur on the Debian boxes I maintain.The problem isn't hugely urgent as everything still runs fine, but it does mean that pretty much every day I get false positive mail alerts from Monit, which is (a) annoying and (b) makes me more likely to miss a real alert.
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May 14, 2010
i cant get Qinternet to auto reconnect when connection is lost due to dynamic IP changes from my ISP.Im using Ifup method.Thing is, every 24 hours, ISP changes my IP and thus, disconnects me from the internet. I need it to reconnect but dont know how to do it.
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Dec 31, 2010
I have a ppoe internet connection. I was easier and faster to configure it in Yast than in Windows XP. When
The provider here sometimes goes through some problems and the connection may disappear and return at any unexpected moment. In Windows there is a icon on system tray that dysplays such information and I know when the connection is gone. It also allows me to try to reconnect manually. Where do I find these information on Opensuse here do I manage to reconnect. In Windows it was also possible to set the connection to re-dial automatically when it was out. It was very useful if it failed in the middle of a download, the system reconnected and the download manager retried until download resumed. Is there some way to adjust opensuse to reconnect automatically when connection fails or some software that does it? Furthermore, is there a good download manager that works in Opensuse that pause, accelerates downloads and retries when connection fails?
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Jan 24, 2010
Its a case of ".... wireless network connection active but still not internet connection .."I am using WEP - 128 key ... Works when I connect directly using ethernet cable ... but not wireless (pci and wireless router)
ubuadmin@ubucomputer:~$ ifconfig
wlan0 Link encap:Ethernet HWaddr 00:06:25:12:83:3b
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::206:25ff:fe12:833b/64 Scope:Link[code].....
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Oct 26, 2015
I have done a clean install of debian 8.2 (jessie) on a new PC. I am working through some of the issues that were not correctly installed. One of them is the wireless network. On startup, I have a wireless connection. At some point within the first 5-25 minutes of being logged in and doing computer stuff (there is no known action that leads to the reaction), the wireless disconnects from the network and will not reconnect. The network-manager-gnome shows three horizontal dots; the system settings> network shows all of the available networks, the strength of their signal, and the "connecting" circle spins. This behavior occurs with both WPA and insecure networks.
I have followed the guidelines for Debian>WiFi>HowToUse (https://wiki.debian.org/WiFi/HowToUse). Nothing appears amiss when following the Network-Manager>Gnome portion of the instructions. I was going to try the alternate WICD program, but one has to uninstall network-manager to use wicd and synaptic also wants to remove something called "gnome", too-- uninstalling a package with that name makes me uneasy. I have noticed that the installed versions of network-manager (0.9.10.0-7) and network-manager-gnome (0.9.10.0-2) don't exactly agree, but I doubt that that is significant.
root@fayalite:/home/agnewton# iwconfig
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"Mineralogy"
Mode:Managed Frequency:2.472 GHz Access Point: 64:E5:99:2C:A0:7E
Bit Rate=150 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=70/70 Signal level=-18 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
[CODE]..
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Jun 11, 2011
My problem is exactly the same as [URL]
but I am stuck at the last hurdle
here are the output of the command that helped to solve the case in the previous post:
ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:1b:77:d2:59:55
inet6 addr: fe80::21b:77ff:fed2:5955/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[Code].....
I have also tried sudo dhclient but it hasn't helped and I am still unable to connect to the internet
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Apr 10, 2010
I have my openSUSE 11.2 connected to router by wifi. I want frequently to access it from my LAN or even Internet, but even so frequent the connection is lost for some reason.
When I am at the box, I can easily do a ifdown/ifup and it will reconnect, but that is a pain when I am not local.
is there some way or maybe a script to check the connection so now and then and if not online then re-connects it automatic ?
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Feb 21, 2010
I've started using slackpkg to keep my system up to date now and after the updates in January my wireless doesn't reconnect after a resume from suspend, I have to connect then kill dhcpcd and restart it. Any ideas what changed there and how I fix it. From the install of 13 until Jan it worked fine.
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Jun 21, 2009
I have installed Fedora 11 recently. I want to share my Internet connection.
I have e LAN connection eth0 which is connected to internet.
I have a Wireless connection wlan0.
I want to share my internet connection with wireless connection.
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Feb 4, 2010
I have two linux laptops. Currently, I'm using both of them at work, side-by-side. Now the problem is, I'm connected to a wireless router, but the wireless only works on one of the laptops. So I'm stuck with one laptop that has no access to the internet. Both machines do, however, have working ethernet nic cards. So, I was wondering if I could use the laptop with the wireless connection to share the internet connection with my other linux machine and access the internet on both of them. Or as an alternative, just use the internet on the machine without wireless and be able to switch back and forth, that would increase my productivity like 30 fold.
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Sep 6, 2010
I have a hp dv3 2110eg laptop with OpenSuse 11.1 (KDE 3.5.10) and Windows 7 dual boot. My wireless disconnects and connects automatically at random intervals. I do not observe this behaviour when operating my laptop under Windows 7. Following some suggestions given in this forum , I uninstalled networkmanager and installed wicd. However, this does not seem to solve the problem. Given below are the relevant information.
uname -r
Code:
2.6.27.48-0.2-pae
/sbin/lspci
Code:
03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh]
Network Connection
/sbin/lspci -n
Code:
03:00.0 0280: 8086:4237
/sbin/lspci -nnk
Code:
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 5100 AGN [Shiloh]
Network Connection [8086:4237]
Kernel driver in use: iwlagn
Kernel modules: iwlagn
dmesg
Code:
iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27ks
iwlagn: Copyright(c) 2003-2008 Intel Corporation
iwlagn 0000:03:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
iwlagn 0000:03:00.0: setting latency timer to 64
iwlagn: Detected Intel Wireless WiFi Link 5100AGN REV=0x54
iwlagn: Tunable channels: 13 802.11bg, 24 802.11a channels
phy0: Selected rate control algorithm 'iwl-agn-rs'
firmware: requesting iwlwifi-5000-1.ucode
The dmesg output shows firmware request (highlighted with red font), but I have already installed the firmware using YAST.
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Dec 21, 2010
I am running FC13 on a Compaq Presario 2100 using a Broadcom BCM4306. I was able to get it running thanks to Fedora Unity Project. But It's a very unstable connection. I don't know what settings to adjust or enable or disable. It's not my router, this is the only wireless connection in the house that I have trouble with.
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