Ubuntu Networking :: Wireless Connection Stops Working Randomly?

Sep 1, 2011

I have a problem with my wireless connection in ubuntu (natty with amd64bit) There seems to be intermittent disruption in my connection. Havent seen a pattern as yet, though it happens once a day. After that I cant get it to work at all and only restarting + reconnecting the USB device helps. Dont know what is going on.I have already read these pages : Commands and Wireless Troubleshooting.Here is my line of though1) Given that I am able to connect other devices to it while I am not able to connect through this desktop, I think the router is OK.2) I am able to work with it after restart + re-connection . And so the driver is OK and is loaded. The driver seems to be oK and loaded even while I am not able to connect.So why is this happening and how can I get this under control without having to reboot and re-connect the device everytime.Here are the output for the commands which will give you a more detailed idea of the process. Before reboot while I was not able to connect:

Code:
Script started on Tue 23 Aug 2011 01:40:08 PM CDT
raja@UshRaj: ~raja@UshRaj:~$ sudo nm-tool

[code]....

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Ubuntu Networking :: Acer 5520 Wireless Randomly Stops Working

Apr 28, 2010

My Acer's Wireless randomly stops working until you fully shut down and start the computer.(Not Restart but Shutdown->Powebutton) I am using Ubuntu 10.04 Lucid.

I am wondering if anyone knows why it would stop working properly, and/or how to fix it?

And since this is a off and on problem I might not be able to provide details immediately from time of crash, since I need my computer on the wireless.

One symptom that really stands out is that the cooling fan is spinning as fast as it possibly can and processor usage is spiking around 80/200 on a process called phy0.(relevancy unknown)

As I was typing this post on my other computer, my laptop crashed and I lost the lshw -C Network output I had. If asked to, I will post the one from when it is working. Also I will post any other info you need from when I can.

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Fedora Networking :: Network Connection Intermittent After DHCP Configuration - Stops Working Randomly

Jul 17, 2009

I'm having a bizarre problem where my network connection stops working randomly. At first I thought it was a DNS issue since Firefox simply chilled out on "Looking up [hostname]" until it timed out, but after further investigation (pinging IP's, "host" and "dig" being unable to reach servers) it became apparent that I couldn't even access the DNS servers i.e. the Wicked Connection of the East was most sincerely dead.

There are two strange things about this: one, there are no errors except "timeout". The network manager is happy, Firefox is happy until the lookup fails... Two, the failures only start *after* DHCP configuration. DHCP configuration never has any trouble sending or receiving packets. I'm going to try static IP and whatnot to see if that helps, more information later.

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Ubuntu Networking :: Stops Working In 10.10 And Firefox Randomly Stops Working?

Nov 13, 2010

I'm running Ubuntu 10.10 Maverick Meerkat 64-bit on my desktop with a wired internet connection (with no firewall). For the past 2 days, I have observed that1. Firefox randomly throws up errors like "Problem loading page" whenever I click on a hyperlink. When I click on Reload, the page loads up just fine. This has been happening a lot recently..and I do not remember updating anything consciously. By the way, ipv6 is disabled in Firefox.2. The network stops working all of a sudden (usually indicated by the Firefox error). The Autho Eth0 indication is active, but I am unable to connect to any external machine.

3. Needless to say, this error is manifesting itself in apt-get as well. I get "something wicked happened" errors all the time, and am unable to download or install anything.That this is not a problem with the ISP is obvious because I also have Windows (from which I'm typing this, ironically), which is able to access the internet.Is this a bug in Ubuntu 10.10?

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Ubuntu Networking :: Desktop Internet Randomly Stops Working?

Mar 2, 2011

Not sure if I've listed the specs of this machine before, so I'll do it again. 'm running an HP Pavilion 760n with 512MB of RAM and (I think?) a Pentium III processor... not sure on that one right now. It's currently running a laptop version of Ubuntu 10.04.I went to log into my online classes tonight only to find that the computer wasn't responding at all. I did a hot shutdown and restarted it, and now the system isn't detecting the internet connection at all. It should be noted that the connection was working perfectly fine earlier today, perhaps 6 or 7 hours ago.I know it's something to do with my computer and not my router, as I'm on my wireless network from a Windows 7 laptop and it's connecting just fine.

In viewing another thread,..lems+-wireless, I found a bunch of commands that it was said would be helpful diagnosing this issue. That said, below is the output of all the commands that I could think of.

Sudo ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:e0:18:5c:45:7a
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0

[code]...

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Ubuntu Networking :: Wireless Randomly Loosing Connection?

Aug 18, 2010

I do randomly (as far as I know) loose my wireless network connection. The only thing to do then is to restart my router and after that it works for a while. I know this is not a hardware issue because I don't have this problem with KDE, only in gnome. I think this problem occurred after I started using 10.04, but then I changed to KDE and forgot about it. But now I'm using gnome again and loosing my network connection over and over drives me mad

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Ubuntu Networking :: Wired Connection Randomly Stopped Working?

Feb 6, 2010

My ubuntu karma desktop is plugged into a wired connection that goes through a router and into my cable modem.Everything was working fine like it had been foseveral months yesterday morningSomething happened by the end of the day that has screwed up my wired networking. I plugged my laptop into the same cable thats plugged into my ubuntu, and the cat5 cable is live. Also when I plug said cable into the ubuntu box, the ethernet lights come on, or atleast a solid green one. Meanwhile the network connections Icon continues to have a red X and a tooltip saying "No network connection".

Under network settings, there is only one wired network "Auto eth0", but it says "last used: never" which is strange since I've been using this for months. When I click edit the main settings are MTU automatic, ipv4 automatic DHCP, and ipv6 ignore.hat could the problem be? By chance did a karma update get released that broke the networking

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Ubuntu Networking :: Wireless Connection Stops A Workin?

Mar 15, 2010

I am having a problem where when i connect to a wireless network at school the internet works for maybe about 30 seconds but then stops. It still says connected but i cant get to internet websites Running Ubuntu Karmic 9.10 Installed "inside" windows School has multiple routers is that a problem? all have same essid Can connect to wirelesss at home flawlessly.

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Ubuntu Networking :: Upgrade To 10.04 - Wireless Connection Is Unstable - Randomly Disconnect ?

May 2, 2010

Since I upgrade to Ubuntu 10.04 my wireless connection is very unstable. I install the needed wireless drivers from 'Hardware Drivers' (Broadcom STA wireless driver) and I got wireless connection, but it randomly disconnect, and also connection is very slow.

I think that the problem are the drivers which are not very compatible with this version of Ubuntu, which means we need to wait for update? I have HP ProBook 4510s laptop, Intel PRO/Wireless 5100 AGN network card & Gembird NSW-R2 router. I'm only having this problem on Ubuntu 10.04, on other OS's the internet is fine.

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Ubuntu Networking :: Iwlagn Connection Stops Working After About 1MB?

Jul 24, 2010

I have an Intel PRO/Wireless 5100 AGN [Shiloh] on my HP Pavilion dv7 running a fully updated Lucid (10.04).I can connect to the wifi on my smartphone and I have no problems at all.However, after a recent update I found myself unable to use my home wifi connection.Once connected, I can usually transfer about 1 MB of data and then nothing else will go through.# uname -aLinux lappy 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 08:03:28 UTC 2010 x86_64 GNU/LinuxSince the home wifi router, a Linksys Wireless-G SRX, is a bit more advanced than the wifi capabilities of the smartphone, I'm inclined to think there is some feature being used that is now broken in the iwlagn driver.I've tried to disable the "11n" support with this:

# modprobe -r iwlagn
# modprobe iwlagn 11n_disable=1

but the problem continues even after that ... is there something else I can try to disable?r some way of getting the details of these two connections to see exactly what the difference is?

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Ubuntu :: Sound Just Randomly Stops Working?

May 26, 2010

It has to be an update or something that cause this. I've done nothing differently from the other days I use this laptop. I have to keep relogging every now and then because the sound stopped working. I can turn the volume up but pidginrhythmbox, nothing makes noise anymore. it's random...it just started happening today and this is the second time the music went out. anyone have any idea of how to stop this from happening in the future?

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Ubuntu :: Keyboard Randomly Stops Working Under 10.04?

Mar 3, 2011

I'm using Ubuntu 10.04 since several months and I randomly have problems with the keyboard (PS2). Maybe 2-4 times per week the keyboard stops working all in a sudden. The symptoms related to this can be- the keyboard simply does not react any more to key press- during typing the keyboard gets crazy and fills the lines with the last typed character- opened windows move to the left when touching them at the top bar, keyboard does not react any more. When clicking on a panel menu the focus line is running permanently quickly through all items, and it's practically impossible to click on any of those (so even shutdown is difficult to achieve, and I might need to use a hard reset).

In nearly all cases the problem only disappears after reboot, just very rarely a logout is sufficient to get the keyboard working again. I googled for similar problems and found quite some people having problems with keyboard (and/or mouse) not working correctly under Ubuntu, but I have not stumbled over a similar error description as I have.Just some config parameters on my box: amd64, XOrg uses an Nvidia driver, 3D and Compiz are activated

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Ubuntu Multimedia :: Pulseaudio Randomly Stops Working?

Nov 10, 2010

Routinely, while I'm working on my laptop, the sound will randomly stop working and I can only get it back by rebooting. I can't seem to find any sort of pattern to what gets it to stop working, but I do have the following programs almost always running: Evolution, Chrome, Transmission, and Pidgin. I usually notice it first when Pidgin stops beeping when I receive IMs.

In the messages log I see lots of messages like this when the audio stops working:

Code:
Nov 9 10:35:04 jbirdjavi-l-u pulseaudio[2031]: sink-input.c: Failed to create sink input: sink is suspended.
Nov 9 10:35:42 jbirdjavi-l-u pulseaudio[2031]: last message repeated 7 times
Nov 9 10:38:18 jbirdjavi-l-u pulseaudio[2031]: sink-input.c: Failed to create sink input: sink is suspended.
Nov 9 10:39:29 jbirdjavi-l-u pulseaudio[2031]: last message repeated 8 times
Nov 9 10:40:42 jbirdjavi-l-u pulseaudio[2031]: last message repeated 3 times
Nov 9 11:01:16 jbirdjavi-l-u pulseaudio[2031]: sink-input.c: Failed to create sink input: sink is suspended.

[Code]...

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Ubuntu Servers :: Vsftpd Stops Working Randomly?

Nov 29, 2010

On a whim vsftpd seems to stop working randomly and any attempted connection times out while waiting for the welcome message.It'll take a couple reboots and a couple "sudo service vsftpd restart" 's and it'll eventually start working again.AFIIK everything is at the most currant version. It just started doing this a few weeks ago.Here is my config file:

Code:
# Example config file /etc/vsftpd.conf
#

[code]...

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Ubuntu Networking :: Squid Stops Working When Switching Connection Type?

Jul 13, 2011

I have squid and dansguardian installed on my laptop. What seems to be happening is when I go from home (ethernet) to school (wireless), or from school to home, squid stops working (sites don't load - at least some don't). My fix was to shutdown squid with

Code:

sudo squid -k shutdown

delete the cache folder and then recreate it with

Code:

sudo squid -z

The problem is that this keeps happening and it is becoming a hassle to have to go through the 1-2 minute process every time I change my connection. I had squid and dansguardian set up and working for about a month on this installation and since Christmas on my old installation. This problem has only started recently. Occasionally, I would have to restart my computer because of DNS issues but I did not have to do so every time I changed connections.

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Ubuntu :: Computer Randomly Goes To Weird Screen And Stops Working?

Dec 3, 2010

I am asking in the wrong place or anything like that, I tried to understand the Tutorials, but I am only human Oh and I am not a native speaker of English, So I also apologize for that...Okay enough apologizing, I will assume that you are all nice people and wouldn't have made fun of my stupidity anywayAs I said I am new to Linux and also to my PC. I bought it a couple of weeks ago and I tried to install Windows on it, but it was displayed in only 16 colors ( I assume this is not connected to my current problem but it might be...) and I couldn't fix that so I installed Ubuntu 10.4.something( It asked me if I wanted to upgrade to the newest version...) . Since then I have been really happy, I only had minor problem with the chat software but after I googled it I found a solution and I even used the console for the first time in my life.

The problem with the chat software is back now, but I don't care about that.My Computer randomly stops working and the screen goes all weird. It switches between a mix of white and black bars, something really colorful and a black screen with text ( I have the feeling it's different text every time) I am not sure what happens after that, because I always turn it off and restart it. It won't react to anything when it is in this weird mode. I don't think there are any special situations in which it happens and I can't reproduce it, it just happens when I don't want it to happen. A friend who uses Linux said it might be a temperature problem, he only knew what I just told you. I am not sure if there is a connection between the time the computer has been on and the time it shuts off...I really like Linux and I would love to use it without ith when I said that I got my PC new ( it was used though) I was trying to say that I don't know whether this is a Ubuntu problem or not

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Ubuntu :: 11.04 - Mouse Randomly Stops Working Inside Applications?

Jul 10, 2011

This happens randomly after a reboot: I can move the mouse cursor and it works perfectly only on the Unity sidebar or whatever it's called. I can fire up applications, but once they're up they completely ignore any clicks or mouse movements (the main menu does not appear on the top bar if I move the cursor in the location that usually makes it appear). They only recognise a click on the close/iconize/maximize buttons.

The mouse works: as I said I can move the cursor and it recognises clicks on the sidebar and the window control buttons; plus, it's connected via a KVM switch both to the Linux box and to a Windows box (from which I'm writing this) and in Windows perfectly.The pattern used to be this: usually while running Firefox, the mouse and keyboard stop responding, and sometimes the whole desktop graphics become corrupted. I can Alt+F1 and go to a text-mode console, but nothing short of a reboot "fixes" things. After the reboot, about two times out of five everything works, three times out of five I get the situation described above.

For the last few hours or so, however, no amount of rebooting and sacrificing goats to the gods protecting sociopaths and Linux software developers have been able to restore mouse functionality. I click on my username on the login windowhere it works perfectly), enter the password and then only the Unity sidebar works: again, the mouse cursor moves, only clicks (right and left) are ignored, as are hotspots. In ubuntu classic there is no place where I can click and launch applications, btw - once I get in I'm basically blocked and can't do anything

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Ubuntu Networking :: Wireless Stops Working After A While?

Jun 16, 2010

I'm having some problems with wireless, it works fine on boot but after a while pretty much randomly, it can be a few days or it can be a few hours, it stops working. I'm not sure which command would tell you what and it would take a little while to debug it because like I said it's random, but if anyone knows what to do please tell me! I'm on Lucid Lynx 10.04.Another something that's really bothering me (But not related to wireless) is that for some reason when I restart my computer, the top panel keeps changing the applets locations.

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Ubuntu Networking :: USB Wireless Stops Working After Upgrade?

Feb 10, 2010

This should be easy for the Ubuntu Gods to sort out:

I have a Sabrent USB 802.11N adapter. (I am using 64-bit Ubuntu in all below)

I plug it into a 9.04 box and it works fine. Plug it into a 9.10 box. Network manager sees it and can attach to the network, but has 0% signal strength, no internet.

Rebuild the 9.04 box with a fresh install to 9.10. 0% signal, no internet. Try 10.04 Alpha 2, 0% signal strength, no internet.

Rebuild same box down to 9.04. Works perfectly. 100% signal strength. I do all updates and then the upgrade to 9.10 using the USB. Everything works fine until the reboot. Then, USB connects, but 0% signal strength, no internet. Oh! ifconfig says the wlan0 interface is up, but it has a random ip address.

I don't mind using 9.04 because for the forseeable future, the box is just going to count aliens for Seti, but my wife wants it off the counter and I would like to upgrade someday.

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Ubuntu Networking :: Wireless Not Working - Stops Than Says Disconnected

May 26, 2011

My Ubuntu when i start it up, go to the wireless networks , try to connect to my network it trys to connect stops than says disconnected. My internet card is a Cisco Aironet wireless (idk the model number)

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Ubuntu Networking :: Wireless Network Stops Working After A While?

Sep 1, 2011

I have a wireless network using this driver:

Bus 001 Device 002: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter

and everything works fine for some time. After a few hours or maybe less (if I push bandwidth to the limit) the Internet freezes. I can't even ping my router. If I disconnect and reconnect either the device or the connection via network manager , it does work for a minute only and then freezes again. If I restart Ubuntu entirely, it works again. But for a while...

It works 100% in Win7 and I have no problem at all there. But I am very annoyed that I cant have reliability in Ubuntu. I want Ubuntu as default.

It has something to do with drivers or an inner variable or buffer or something.

At least, is there any way to reset my network connection without rebooting the OS?

I tried sudo /etc/init.d/networking restart but it gives me: Ignoring unknown interface wlan0=wlan0.

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Ubuntu Networking :: All Wireless Stops Working If Loopback Is Enabled In Router?

Jun 8, 2010

I'm running a Source Dedicated Server on my Ubuntu laptop, and to connect to it via external IP from other computers in the network I need to enable loopback in my router.This was working fine, but then I disconnected my laptop for a few days, and when I came back the wireless stopped working on my Xbox. I reset the router to factory defaults, and then setup everything again. It was all working fine until I enabled loopback again and power cycled my router. Now every time I do that, the internet on Ubuntu stops working and the wireless on the Xbox stops working.

Edit: You can ignore this I guess. It seems I was actually DISABLING loopback by enabling that router option, which I guess caused this. Strange, because the first time enabling this option was the only way to get my external ip to work. Oh well, everything is fine now.

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Ubuntu Networking :: Wireless Dell 1450 USB Adapter Stops Working After Upgrade To 10.04?

May 1, 2010

I upgraded from 9.10 to 10.04 and my wireless card no longer works.

The card is a Dell 1450 USB a/b/g card.

lsusb sees the card. device id is 413c:8104

dmesg says that p54usb is trying to load firmware isl3887usb but that failed (error -2)

I looked in /lib/firmware and didn't find that file

ps. god why did i upgrade?

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Ubuntu Networking :: Intel 5300 Wireless Stops Working After Downloading 100 Megs?

Sep 9, 2010

I have a Dell E6500 with and Intel 5300 wireless agn card running Lucid x64. Wireless works fine and speeds are great except when I download with either the browser or thru a torrent or even updates. Once I get to around 100 megs in to the file wireless stops working and the only way to get it working again is to disconnect and reconnect to the AP. I have installed the back ports and tried several other fixed to get this to work but nothing has helped. One more note this happens on 2 other wireless routers that I have tried so I know that it's not limited to my Linksys.

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Ubuntu Networking :: Wireless Network Shows Connected / Periodically Stops Working

Aug 8, 2011

I have one major problem that is going to cause me to switch back to windows. My wireless network shows connected and works fine for a while but periodically stops working. It always says it is connected but sometimes stops working to where I have to disconnect and reconnect for it to start back up again.

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Ubuntu Networking :: Network Stops Randomly?

Aug 18, 2010

my server which shares my internet connection with the rest of the house recently started to randomly quit the eth0 connection and the sharing connected with that. after a reboot all is fine again /var/log/messages shows the following

Code:
Aug 18 19:53:36 Gomorrah kernel: [93072.000029] ------------[ cut here ]------------
Aug 18 19:53:36 Gomorrah kernel: [93072.000048] WARNING: at /build/buildd/linux-2.6.31

[code]...

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Ubuntu Networking :: Wireless Repeatedly Stops Working On HP Pavilion/Intel 4965AG/Karmic

Feb 9, 2010

My wireless LAN connection on this machine occasionally stops working. The network traffic bar shows periodic very small transmissions but the failure of all network dependent applications (Firefox, package manager, etc.) indicates to me that the machine is no longer talking to the net. I can fix it by reselecting my home network in nm-applet from the drop-down list. This causes the machine to disconect, reconnect and all is well for some random period of time thereafter. Here's some data:I'm running an HP Pavillion laptop.

Code:

~$ lspci | grep Wireless
02:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)

Code:

~$ lsmod | grep iwl
iwlagn 124768 0
iwlcore 134820 1 iwlagn
mac80211 243496 2 iwlagn,iwlcore

[code]....

I don't know if this is related or not, but a couple of months ago I unsuccessfully attempted to share a hotel's wired Internet connection over my wireless card. I may have hosed some settings or it could be unrelated.The "unknown interface" portion of the restart attempt is interesting but I don't know enough to fix it.

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Ubuntu Networking :: Wireless Stops Working With Multiple Intel 5100 (vaio) On Wifi

Nov 24, 2010

I'm using a Vaio TT, which seems to use an Intel 5100 WiFi chipset, and a Linksys WRT54G2 (firmwares 1.0.1 and 1.0.4), ubuntus 10.10 and 10.04.

Wifi works fine out of the box. However if the other vaio tt in our office (running windows 7) comes online, my laptop stops being able to make new connections. It WILL stay connected to chat servers, and downloads SOMETIMES continue to work. However all new HTTP requests / ssh connections / rdp connections / pings fail. The laptop still appears to be "connected" to the wifi network.

This may also happen after an undetermined amount of time without the extra vaio. It is not solved by reconnecting or rebooting. Once the extra vaio leaves the building, everything works fine again. This problem does not happen at all if I boot into windows.

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Ubuntu Networking :: Broadcom Corporation NetXtreme BCM5721 Network Card Randomly The Network Connection On The Server Will Stop Working?

Jan 29, 2011

I have a Broadcom Corporation NetXtreme BCM5721 network card on my server at work.Everything works fine for a few weeks, then randomly the network connection on the server will stop working. After it stops working, I will try to reconnect with the network manager, it shows a wired connection available, it shows the "connection in progress"animation, then the "connection disabled" icon.

I uninstalled the network manager and used manual configuration, but do you think the network manager was the issue? I can't have the server disconnecting randomly every few weeks with no way to know what the real problem is. Was there an issue with the network manager with 10.04?

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Ubuntu Networking :: Wireless Is Not Working (only Wired Connection Is Working)

Jul 18, 2011

I can connect to the internet with wired connection. The switch for the device is on but this command "sudo lshw -C network" has the following results:

#
[sudo] password for nn:
*-network
description: Network controller
product: BCM4312 802.11a/b/g

[Code]....

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