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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Networking :: Network Has An Intermittent Fault - File Share Network Stops Working

May 7, 2011

Sometimes my file share network stops working,and will then work again.I'm lost with this problem. The server pc is a Zenwalk pc.The other pc is a win7 pc. This error only occurs on Zenwalk. When i run puppy from the live cd the file shares are always visible,without fail.Under puppy i use pNethood. When the ping command is used there is no problem, and the pc name can be pinged.This is shown below:


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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:

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


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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 :: 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 :: 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

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


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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: Bcast: Mask:


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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 :: Intermittent Mobile Broadband Connection Just Goes Off Without Doing Anything

Apr 3, 2011

In the last week I have noticed that sometimes my Mobile Broadband connection just goes off without me doing anything! I have credit on the dongle account, so it isn't that. I'm using fedora 14 on an acer aspire one netbook. Dongle is a Huawei E160 on o2 here in the UK Kernel is

Sometimes unplugging and replugging the usb dongle works. Othertimes, I have to leave it out for several hours. It does seem to happen daily, though.

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Ubuntu Networking :: 9.10 Dropping Network Connection Randomly?

Feb 20, 2010

I have a windows installation (partition) but have installed into freespace on the same drive using the auto-partition manager, etc, and everything is fine. I got my network going fairly easily by going Preferences > Wireless and inputting SSID and WPA encryption key (PSK). My router issues an WLAN IP, I can get on the net, I can see my other Windows PCs on the network, I can reach my router, and all is good.So after several hours of mooching about and looking at things, I have updated all the Linux packages via Synaptics (following a prompt to update everything) including GRUB. My dual boot now shows two versions of the OS:

GRUB 1.7~Beta4
Ubuntu, Linux 2.6.31-19 - generic (I am booting this one)
Ubuntu, Linux 2.6.31-14 - generic

I also set up my HP F4580 printer over wifi on the network though with slightly incorrect drivers (for the F4400 series as this was recommended at the closest match). It works, and I can print a test page no problem.The only thing is that now (since doing all that) Ubuntu seems to periodically drop my connection to the network and then request the network PSK again, but when I enter it, it spends time trying to renegotiate but fails, and then re-requests the PSK, over and over and it never reconnects. I have to reboot and then I can connect again (automatically), until it drops at some random point (like 5 or 10 mins later)

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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 :: 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:

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.


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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:

# Example config file /etc/vsftpd.conf


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Debian Configuration :: Web Site Stops Working / Have To Reset Networking

Nov 9, 2010

I'm running Debian server 5.0.6 and the latest stable version of Apache. I am hosting a website and it will stop responding after an unknown amount of time. In order to make the website work again I have to run /etc/init.d/networking restart. The server is running a static IP address and is not resetting when the website goes down. I don't know where to start looking.

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Networking :: Intermittent "No Network Connection"?

Nov 29, 2010

Over the past two months I've migrated two NetWare servers 6.5 SP7 to SLES10 SP3 and OES2 SP2.'ve had some consulting assistance and been learning linux as I go. Now I have a b!tch of a problem with a Dell PE SC 1430 with integrated Broadcom BCM 5751 GB Ethernet working ok, but then after a reboot it will come up with no networking. I've used Network Manager to configure a static IP but it willsometimes come up and ifconfig will show no ip assigned.I can manually assigned ip, netmask, gw and can ping the gw, but can't ping any host on the subnet. I disabled the integrated NIC and installed another, but same problem.

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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


sudo squid -k shutdown

delete the cache folder and then recreate it with


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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Fedora Networking :: Network Connection Manager Gone / Not Working

May 15, 2011

Fresh install of Fedora 14 from Live cd.Used it for an hour or so, d-loaded some programs, had ti all running great. Wired connection to internet. Had the Network Connection Manager icon in panel. There was an icon saying new updates, alot of them, like 400 or so. Told it to go ahead and up date, left room. Came back hour later was done, said it needed to re boot, so I did. From then on, no internet, not icon, no Network Connection in the drop down list for preferences.

What I have tried:Worked off live cd, again, all works fine, icon, manager, internet all there.In installed version: In terminal, typed service Network Manager, it said unrecognized service.Did yum install network manager. It started to do it, but looked like it was trying to get stuff off mirrors, and of course there is no internet access. error PYCURJ ERROR 6.Of course I can re install, but I figure I will just end up in the same place a few hours from now.

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Ubuntu Networking :: Internet Connection Sharing In Network Manager / No DHCP Server

Oct 14, 2010

How do I tell the shared connection that it has a static IP and that I dont want a DHCP on the network?Do I have to set up DHCP on the box with the shared connection, even if that box only runs DHCP for a single IP address being the eth0 that is shared?Or can I tell the shared connection that it has a static IP and still allow network manager to run the shared connection?Or should I specify static IP's for all clients and the shared network manager and install say firestarter on the gateway to run the NAT for the eth0 out to eth1.

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Networking :: Dhcp Not Working After Restarting Network ?

Jul 12, 2010

I installed dhcp on my Debian server and it was working fine.

untile I restart network with this :

And then dhcp was not working.

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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 :: 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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Fedora Networking :: Ping Working But Internet Not Working From Dhcp Clients

Jul 17, 2009

I have a strange problem for internet. My clients (winxp - S2) can't get internet.Let me explain my scenerios. Fedora 10 with lan (eth0) having direct internet from dsl model, client (XP service pack 2) can use samba shares using dhcp (wlan0) installed in Fedora 10 box. client can ping my linux box.Now problem is: client (dosbox) can ping the google ip address (i.e ping but can't use 'ping www.google.com'. That means ping with ip works for internet from my client. My linux box can. I can use internet from FC10 but can't use iexplorer from my client to have internet. I have enable ipmasquarding in Firewall and dhcpd is running on wlan0 for dynamic ip address of my clients.Can someone suggest me what kind of problem having I? What should i do to success iexplorer for internet? what possibly am i missing?

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Fedora :: Sound Stops To Work Randomly?

Apr 27, 2011

i have fedora 14 and sometimes the sound on my laptop stops to work.e.g. lately it happened when some system sound occured (pidgin message sound) and flash video started at almost the same time (videos)by lost sound i mean i can play music in amarok and i don't hear anything.no sound from flash or system sounds. aplay or paplay is not heard.i tried to log out and log in (restart the desktop session)i had to reboot to fix it.i tried to do "pulseaudio --kill" but that did not helped.any idea what should be restarted in this cases?

lsmod | grep snd
snd_hda_codec_nvhdmi 11784 1


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Fedora Hardware :: Keyboard Randomly Stops Functioning?

May 19, 2011

Im Using FC14 and i like it so far. been trying around a bit and made searches for my problem but either im blind or im the only one with this problem (which i doubt) i have a problem of the keyboard "dying" on me mid using it. it doesnt seem to matter what im doing, it still goes dead on me sporadicly. ive tried changing to 4 different keyboards. PS2 and usb keyboards. but all 4 keeps sporadicly dying on me until i reboot and it works again until its dies.im wondering if the problem is in the hardware detection somewhere..if you need hardware information it would be nice if you posted commands so i understand what you need

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Ubuntu Networking :: Intermittent Wireless Broadband Connection Recognition?

Mar 27, 2010

Using my usb mobile broadband dongle I am able to access the internet about 25% of the time. I am able to make a connection to the '3' wireless network 100% of the time, but often Mozilla and all other applications that rely on an internet connection do not recognise that this connection has been successfully established, and give me error messages claiming there is no internet connection.

I can't discern any pattern as to whether the connection will be recognised or not. When it isn't recognised, the only solution is to disconnect and reconnect to the network. Sometimes this works and sometimes it doesn't. Sometimes restarting the computer fixes the problem, and sometimes it doesn't. I also have access to a wireless network at uni. I have no problems using this network whatsoever. Housemates using the same dongle on Windows have no problems. I'm using an Acer Aspire one, the dongle is a Huawei e220, I'm running Ubuntu 9.10. I have only recently reinstalled the operating system and have not needed to mess around with any network settings to get the usb dongle to 'work' the way it is currently.

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