General :: Intermittent LAN Connection Booting Fedora 13
Oct 3, 2010
From time to time I have no connection to the net after booting the machine. This is a wired connection that goes through a switch, then a router to a DSL modem. When there is no automatic connection, I can't connect manually either However if I re-boot the connection works normally.
The Network Connection indicates eth0 and eth1 are both set at "Auto" Strangely the "Last Used" column indicates "Never" for both even when I am actually connected, and on line.
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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 2.6.35.11-83.i686.fc14
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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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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Jun 24, 2011
This was originally posted on the Ubuntu forum, but someone suggested it might be a hardware problem, so I've re-posted (and updated) here: Quote: Originally Posted by Girts My shiny new Dell has developed a booting problem over the last few weeks. The Dell splash comes on for up to 10 seconds, screen turns Ubuntu purple for up to 20 secs, then 'no signal' message is displayed by monitor and screen goes black. Hard drive light goes off, mouse and keyboard don't respond.
When the Dell engineer came to replace a suspected failing hard drive, he realised the noise was coming from the fan on the graphics card (ATI Radeon HD6670). I mentioned the PC was reluctant to boot first time, so he replaced the whole graphics card. However, the PC is still intermittently reluctant to boot first time (3 tries a few days ago, but OK since).
Before I call Dell again, I want to be sure it's actually their problem and not a Ubuntu/Linux thing! I'm not fluent in Linux, but has anyone got any thoughts on this?
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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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Nov 7, 2010
I've got UNE 10.10 installed on a Samsung N150 that uses the RTL8192E for wireless. When the wireless works then it generally works okay, but I'm having problems with reboots and long-running connections. This is different to the mass of posts (mainly from 2009) about the card not working at all, so I started a new thread.Basically, 90%+ of cold boots result in a successful wireless connection, with Network Manager remembering my WPA password.
When the wireless is up then it never obviously drops out, but I've got an app with a long-running connection that seems to disconnect itself occasionally. Looking at Wireshark then it appears that there are a number of retransmits, and a big batch just before it disconnects (which implies that the app is dropping its connection because it thinks the other end disappeared). Running the app on another machine with a different card but through the same release of Ubuntu and the app and the same router doesn't result in retries or drop-outs.On the times when a cold boot doesn't successfully reconnect then it asks for the WPA password, then continues trying, then asks for the WPA password again, then continues trying, then asks...and so on until I rmmod and modprobe the driver.
I originally had problems with the machine refusing to restore after a hibernate/suspend, but this was solved by a tip to rmmod the driver on hibernate/suspend and modprobe it on restore.The wireless will now work okay on some restores, but is more likely to repeat the behaviour described above for the failed cold boot.
Code:
$ lspci -nn
...
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8192E Wireless LAN Controller [10ec:8192] (rev 01)[code]....
Attached is a file with some snippets from dmesg around the time of the wireless failure, and the log of what it does after a remove and re-add for comparison of the "correct" messages.
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Feb 25, 2011
I have set up one of my linux box as link load balancer for two ADSL connection. After deployment, I have found out that instead of being fast, it has become slow. What I have observed that my request get out to internet but comes back intermittently. Is this a standard scenario ?
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Oct 28, 2010
i have just installed 10.10 under wubi, first time trying to use this network card under ubuntu. works fine on XP where it connects with good signal strength to a zyxel p-600 b/g router (my 3 other machines also connect fine to this router)
i am using WPA2, it takes 30secs to 1min to connect in the first place, then runs slowly and with intermittent disconnects, reports good signal strength in network manager.
i have been fortunate enough to have 3 machines that run ubuntu flawlessly out of the box..
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Mar 31, 2010
I'm having problems with my internet connection; it seems to be working fine then every other click of a page there is no connection, then I click it again a second later and it works. I am using a wired network connection plugged into an addon wireless router.
When I use ping under network tools it seems to be fine, then freezes halfway through and doesn't receive those few packets, giving me a transmission percentage of about 70%.
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Jul 31, 2010
I have a Dell laptop with a bcm4312 wireless card. Every once in a while though, the laptop is unable to send or receive any data for 30 seconds. The connection is not dropped, and nothing shows up in any system logs. Both the wl and b43 drivers have this problem, but it works fine under vista.
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Jun 1, 2011
I am in a situation to boot fedora 15 live cd in to command line mode, not graphical mode, for some testing purpose. how to change argument during booting mode
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Jun 13, 2009
The symptom is that NetworkManager repeatedly ask for password to connect to my AP.My AP is secured with WPA-PKI. The problem even happens with Fedora 11 live cd if I'm not quickly configure wireless connection using NetworkManager right after Fedora completes booting up. It means if I promptly configure wireless connection, i'm still able to access Internet. Same thing happens for the first boot of Fedora from hdd. For the second boot or when I dont quickly configure wireless connection when system finished booting up, NetworkManger repeatedly asks for password for AP.
I did try several approaches posted in this forum but problem still persisted. Some of approaches I tried are:
[Code]....
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Jan 4, 2011
I just installed 10.10 (2.6.35-24-generic) and my wired network connection is cutting out. I'm dual booting with Windows 7, and it works fine over there. I'm confident it's not a hardware issue. It works initially, but after a few minutes (this varies) the connection will drop out. If I'm on Firefox, I'll get "Loading" until the connection times out. If I'm using RDP to a local computer, I'll lose the connection. When it happens, if I ping a local computer, I'll get:
[Code]....
So I'm getting a bunch of packet loss. Some of the time, once the packets do start going through again, Firefox will finish loading the page. Other times, I have to click on network manager and click on "Auto eth0" which will give me the "connection established" message, and kick the network card back into gear. Sometimes I have to do this several times. It never shows as disconnected, but this somehow gets it going again.
[Code]...
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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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Apr 1, 2010
I'm running Federa12 on my Asus EeePC 1005HA and I can't upgrade my system because my network connection flakes in and out. I'm connecting to the D-Link DIR-655 802.11n router. Any hints or ideas? I'd rather solve this than just plug-in the ethernet cable.
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Mar 7, 2011
I have Fedora 13 installed on a new PC and have two types of intermittent boot hangups. What logs exist within Fedora 13 that may help me identify the cause or causes of these hangups? Todate, a reboot gets over the problems but I wish to get this sorted whilst the PC is still under warranty.
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Sep 20, 2010
rhel5.5 rhcs cluster and xen kernel . now the cluster is running . the service ccsd .cman ,and rgmanager does work on both of the cluster member host. now I have a connecting problem when access the cluster virtual IP from different subnet clients. the clients in the different subnet with the cluster virtual iP access the VIP , the connection is intermittent ,while the clients in the same subnet of the VIP access the cluster VIP the connection is always on.
could anybody tell me , does the xen kernel has impacts to the cluster , or is this only a networking problem not a system problem? I monitor the switch mac table, find that , the mac of eth0 is always changing . so maybe it is xen kernel problem. I refer to some xen materials , the eth0 is a virtual adapter .and the original physical adapter eth0 is renamed as pth0 and works as a bridge .so how could I fix a mac address to eth0 ?
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Aug 23, 2009
Estimating 10-20% of the time while booting I get an error like the following for USB partitions I am trying to automount in boot.log:
Code:
Mounting local filesystems: mount: special device /dev/sdc1 does not exist
mount: special device /dev/sdc2 does not exist
[code]....
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Apr 20, 2011
For most actions on my system now it seems that clicking doesn't get a response on the first click. It can take 2 - 4 clicks at times for the system to react. Although I work primarily in my browser (Google Chrome), it does happen outside as well. I am running Gnome as the window manager.
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May 16, 2011
I'm trying to solve an intermittant serial port problem on an embedded medical monitor. We have determined that the port is receiving characters from the external device but the serial thread is not transferring the chars from the buffer. this problem happens at start up about 1 in 50 boots. We're using kernal 2.6.29.6.
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Jan 14, 2010
The shares get mounted correctly and you can navigate through the directories and open files.The only problem is that it randomly starts going really slow taking 30 seconds or longer to open a directory that has 2 or 3 files in it.I have tried quite a few things to try and fix this without any luck. Its getting to the point where I am having to consider recommending that we use windows instead, which I would rather not do as I think its good for students to experience different operating systems during school.
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Mar 29, 2010
My server is running Red Hat 4.1.2-44.I am having an issue with it hanging (website doesn't respond, can't connect via SSH (it's a remote server)) after 4am on every 3rd Sunday or so.A reboot is required to get the server responding again.I have checked every logfile I can find and found nothing that helps me. The thing I have noticed is that some of these log files start afresh after the reboot so my initial thoughts are that it is a logrotate issue or something similar.
The last activity I can find before the reboot (at 8:32) is in the logfile /var/log/cron:
Mar 28 04:22:01 crond[9356]: (root) CMD (run-parts /etc/cron.weekly)
Mar 29 08:32:39 crond[3884]: (CRON) STARTUP (V5.0)
[code]....
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Nov 30, 2010
I have a core i7 machine on which I have dual booted Ubuntu 10.10 and Fedora 14. I am facing a weird problem on both the Linux distributions. Currently, I am facing three major problems which are causing me to use my laptop instead of this machine.Most of the times the sound gets distorted ( like the tempo is very slow and some cracks), but some other times it just works fine. ( I experienced this on both Ubuntu and Fedora)Internet at times is very fast and works great, but suddenly it slows down and takes a whole lot time to load. sometimes it just never gets fast.The low resolution flash videos, gets this very weird high pitch sound
Also, I noticed ( I don't think there is a relation between the two or is there?) that whenever the internet is slow, the sound is also distorted and when internet is fast sound works great.The intermittent nature of the problem is making it difficult to debug.
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Jan 2, 2011
I've been having a problem with intermittent stuttering in video and audio playback since upgrading to Maverick (it also happened when I briefly installed Lucid). It started out as the odd skip every 20 minutes or so but now it can happen 5 or 6 times in 10 minutes when watching a film. I've tried:
reformatting and clean installing using a half-dozen players installing every codec I could think of (only after the normal ones wouldn't help) diangosing my 3 hard drives (the problem occurs on them all and they're not in a RAID setup) changing then changing back my video drivers disabling pulseaudio and ubuntuone-sync (these were not installed in my previous, working setup) looking at every relevant log file (mplayer, smplayer, demsg...) I know of running ubuntu's testing utilities I'm out of ideas. Going back to Jaunty is the only solution I'm pretty sure will work but it's not exactly ideal. It will be a few months a least before I'm able to install a completely new distro.
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Aug 28, 2011
I'm having a bit of Internet trouble with a fresh install of Ubuntu Natty and I haven't been able to track down the problem. I have my desktop running over a wireless network, which connects without fail. Somewhat frequently, however, connections to particular websites will start timing out (google, facebook, stackoverflow, us ubuntu archive, etc.). I'm also having a strange issue where my home page [URL] is redirecting to [URL].
Initially I thought it might be an issue with Comcast DNS, so I updated the router to use OpenDns servers. When that didn't work I started to try accessing some of the problematic sites through my laptop (which is using the same router) and they all connect without problem. The issue seems to be with my Ubuntu install, but I'm not sure where to look.
EDIT After doing some further digging, this is starting to look like a DNS issue. My home page appears the resolve to an incorrect ip address when the redirect issue occurs. Still not sure how to track down the problem, however.
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Jul 30, 2011
I am using FC 2, and I get 'eth0 failed' during startup.
I am configured for DHCP
device is 'inactive' under network device control after reboot
click 'activate', sometimes I can surf, others not.
When I can't get online, sometimes deactivating and reactivating works.
edited connection to 'activate device when computer starts'
eth0 still fails at start-up, and device is inactive.
I am supposed to use FC2 for my schoolwork
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Jan 28, 2010
I have a Compaq CQ40-616TU Laptop. I have installed fedora 11 64 bit more then 20 times and facing the same problems. The Problems are
1) After booting into the fedora it get hanged up and blue screen with the logo of fedora.
2) Some time it shows message that "Could not update /var/lib/gdm/.IC Eauthirity"
3) I have also updated through yum but still facing the same problem
4) I have also tried fedora 12 but during installation process it shows message that no suitable hardware found.
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Oct 31, 2009
Ever since the upgrade to CentOS 5.4 the system boots extremely slow and x-windows is virtually unusable unless the machine is connected to a network. It hangs at netstat, cups, httpd during the boot process. I utilize the operating system to create Asterisk servers and sometimes they are not connected to a network ever.
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Jan 6, 2011
I am using a linux kernel 2.6.36 using mips architecture. I have succesfully booted the machine through Flash memory, but it is not booting through nfs. It is getting stuck at the stage where the image starts loading. In short the vmlinux.img file is being copied properly to nfsroot but the image is not loading.
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Jul 19, 2011
I'm having problems booting up my Fedora 14 system. I see the Fedora splash screen (the one with the egg-like logo that colorizes as it loads); the logo fills up completely and then everything hangs - all I see is the egg logo, and nothing else is ever displayed. I also can't get to any of the ttys via the CTRL-F1 sequences.
I can boot into single user mode just fine. The install scripts all run just fine. The system itself is actually up an running, so I suspect this is either something in the KDE startup, or after init processes all of the start up scripts.
I'm assuming this isn't a startup script problem, because I see a "started XXX" message for every service in the rc.5 directory - in other words, all the startup scripts ran from rc.5.
So, how do I find out what is hanging? I'm not seeing anything in /var/log/messages, and pstree didn't tell me much about what init was doing.
I used to be able to follow inittab to see all the things it did at boot, but since inittab was stripped of everything it used to do a few releases ago, I don't know what init is doing anymore.
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