My network seems to be dropping every few minutes to few hours. There are a lot of networks in the area (apartment in NYC) and I wonder if it might be due to competing traffic. Any ideas for how to tell what channels other networks are on? or other modifications to router settings that might improve performance in this situation?Additionally the "Invalid Misc" in iwconfig is counting quite quickly.
View 4 RepliesThis week I did a fresh install of Ubuntu 10.10 on a newly assembled PC. The hardware I am using is below.
My wife has a Macbook with built-in Wifi connected to our Linksys router. Previously, the connection would drop 0-2 times a day. She would turn off Wifi on her Macbook, turn it back on, and it would reconnect immediately.
Since getting my Ubuntu PC, these disconnections have become more frequent, every 30-90 minutes. They effect both computers simultaneously. And now, I MUST turn off Wifi on my Ubuntu box to regain the connection. Switching it off and on with the Mac doesn't help. Unplugging the router doesn't help. I have to run upstairs and uncheck "Enable Wireless" on the Ubuntu Network Manager outlet.
The connection doesn't seem to drop if the Ubuntu PC is sitting idle. But it can happen with web surfing, Samba file transfers, or torrent downloading.
I noticed that Encore has a linux driver for my card called RT2860. It looks very difficult to install. Ubuntu automatically uses RT2800. So I don't know if this could be a driver issue. Also, shouldn't my bit rate be more than 1Mb/s? Both the router and the card are 802.11n. Are the dmesg errors something to be concerned about?
Machine Brand and Model (PC/Laptop): Self-built Desktop. AMD Phenom, Gigabyte motherboard. Router Brand and Model: Linksys Wireless-N Broadband RouterWRT160Nv2. (I already updated the firmware to the most recent version)
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Here is the layout of my network:My cable modem plugs into eth0 on my ubuntu server which acts as a firewall (shorewall) and dhcp server to my lan. A dd-wrt access point is plugged into eth1 and then a bridge connecting my xbox360 and another bridge connecting a desktop computer.Everything works pretty well, except a few times a day, my network will just shut down. The wireless on my macbook and my wife's laptop will just shut down, and if my xbox is running, it will lose connectivity. It will be down for maybe a minute or two, and then come back up like nothing ever happened.I never had this problem when I had just a dd-wrt router running everything instead of my server.When I ssh into my server afterwards and run dmesg, this is what I will get:
Code:
[398598.251548] martian source 169.254.1.255 from 169.254.1.33, on dev eth1
[398598.251565] ll header: ff:ff:ff:ff:ff:ff:00:23:69:3d:b1:82:08:00
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As soon as i'm starting to copy a large file enough file (>700Mb) to my ubuntu box (connected to an Asus router via wifi) from a Windows 7 client (connected to router via ethernet cable) i get a dramatic drop in speed. upload starts at 1,0Mb/sec with a ping to ubuntu box at <1ms, and in 2 minutes it drops to 200kb/sec with a ping of over 1000ms! The ping increases with every second in a linear progression.
To exlude router as a possible problem copying to a windows 7 notebook connected to router via wifi results in an average of 2,7Mb/sec with an average ping of 150ms.
MB Model: Asus P5B Deluxe wifi
OS: Ubuntu Server 9.10 + desktop installed
Wifi configured via GUI
2. lsusb
3. wlan0
4. lsmod
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)
I've got a Belkin F5D8055 v1 wifi usb adapter. I use the rt2800usb driver for it. Strangely it uses only 54 Mbit/s instead of 300 Mbit/s. I thought it was ok, since I use the wifi only for accessing the internet. However, the network manager keeps dropping the signal, and I can't understand why. I'm close enough to the router.
iwconfig:
wlan0 IEEE 802.11bgn ESSID:"MyHomeRouter"
Mode:Managed Frequency:2.447 GHz Access Point: 00:22:2D:06:2C:50
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Within the last couple of days or so, my wireless has been on the fritz. It keeps disconnecting and reconnecting every minute or so, which is annoying to say the least. The information relating to my wireless network is:
Laptop model: Toshiba Satellite L350
Wireless interface: Atheros AR5001 Wireless Network Adapter
Interface:
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For the past week or so, I've had my wireless connection disconnect and reconnect at seemingly random intervals. It can be anywhere from every minute to every hour, whether I'm using the network or not. I don't recall installing anything that could affect this. I'm fairly certain this isn't a hardware issue, since I haven't had any problems when using my Windows partition. I'm using a D-Link USB adapter (DWA-171).
Code: Select alljp@pyrog:~$ more /etc/*-release
PRETTY_NAME="Debian GNU/Linux 7 (wheezy)"
NAME="Debian GNU/Linux"
VERSION_ID="7"
VERSION="7 (wheezy)"
ID=debian
ANSI_COLOR="1;31"
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i have an asus eeepc that i recently upgraded from ubuntu 9.10 to 10.04. the wireless networking has worked great up until about 2 weeks ago. now it occasionally drops the connection (can't ping the gateway), even though the "blue bars" still say connected. my current solution is to click the bars, do a "disconnect", and then reconnect.i've ruled out the router being a problem (all 17 other wireless devices in my house remain connected), and i've ruled out a laptop hardware problem (when i dual boot into win7, i never lose my connection).
i'm new to linux (installed 9.10 back in february), but not new to computers/networking. i run a major campus lan [windows based] and have worked all aspects from the early mainframe days to client support to server admin to helpdesk - after 17 years, i'm now in management, so i've lost my edge a little... plus, being brand new to linux, i'm feeling a little lost in the troubleshooting aspect of this.i do believe that i've narrowed my problem down to "almost exactly" when this occurs. the wireless connection drops out as soon as i start to do "network intensive" stuff like watch a videos video, play a facebook flash game, or (and here's the kicker), try to run the update manager. unfortunately, this means that i have not been able to update for a few weeks now. i'm up to about 150mb worth of updates that are waiting.
I just configured my (dataone) ADSL connection and now it stops intermittently. Can anyone tell me why this happens and what is the solution for this.
View 1 Replies View RelatedI have an Ubuntu box, 11.04 x64, running on a Dual Opteron SFF box (iWill ZMaxDP... pretty old machine). Up until a few weeks ago, it was acting as a Windows 2008 Server, but i moved it to Ubuntu.
Anyway, the machine will not stay on the network for any amount of time, without falling off... I have changed network cards, cables, ports on the switch, etc, and nothing seems to work. I have a Windows 2003 box giving out DHCP addresses, and for a while, i actually tured that off and setup a second Ubuntu box to give IPs... it made no difference. The box gets an IP, and can ping outside for a bit (2 min or so) and then just looses connectivity... ifconfig shows it with an IP (i have tried both Static and DHCP config) and nothing seems to work...
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I set up the web/backup server for our department and I'm having some major issues. Firstly, the server seems to be dropping the network connection periodically. I checked all of the logs and it appeared to be an IP6 issue as the only message that seemed to correlate with it was "eth0: no IPv6 routers present" in syslog. I added "ipv6.disable=1" to my boot options in menu.lst and this seemed to take care of the problem. However, I woke up this morning and the server was back down.
This didn't seem to take care of the problem. It seems to occur when my automatic backup scripts go through. I have several BASH backup scripts that use rysnc over SSH to backup several computers to the server and the server to my desktop at home. I was able to trigger the problem a couple of times running the backup script this morning. Now, I'm getting the following error when running the script, instead of losing the network connection:
Code:
Sep 11 10:22:40 chemistry kernel: [ 396.892699] BUG: unable to handle kernel NULL pointer dereference at 0000000000000118
Sep 11 10:22:40 chemistry kernel: [ 396.892715] IP: [<ffffffff811426c0>] __dentry_open+0x240/0x370
Sep 11 10:22:40 chemistry kernel: [ 396.892728] PGD 1113d5067 PUD 11458c067 PMD 0
Sep 11 10:22:40 chemistry kernel: [ 396.892737] Oops: 0000 [#1] SMP
Sep 11 10:22:40 chemistry kernel: [ 396.892743] last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
Sep 11 10:22:40 chemistry kernel: [ 396.892750] CPU 1 .....
I tried booting with a previous kernel to see if that was the problem and I'm still getting this error. I've searched through all of the logs that I could think of to try to track down any software based problems and I just don't see anything. In the past, whenever I've run into such serious with a Linux box that popped up out of nowhere, it's always been a hardware failure. I've currently disabled all of the backup scripts and I'm going to see if it lasts through the weekend.
I'm running F13, using Network Monitor to control my DSL connection. Until recently, all was well. Then, about a month ago, I tried changing my DNS numbers for reasons that seemed good at the time. Being properly paranoid, I kept my old DNS numbers in a text file. It's a good thing, because from then on, every time I needed to reboot (I only reboot for a kernel update, only shut down for hardware issues or a power failure.) I had no DNS until I copied them back into the configuration, disabled and re-enabled the connection. We've been having some work done here on the exterior, and every time the workmen come they manage to drop the power on the room the computer's in. I don't know if it's significant that all of the DNS losses have come after a power "failure," but it's worth mentioning.
View 13 Replies View RelatedI loaded up OpenSuSE 11.4 on a HP DL360 G5 64 bit server. When the server boots up, I can connect via the wan or the local network segment. After some time, I will lose the WAN connection. If I ssh back into the computer from another computer the WAN connection can connect again for a period of time. The WAN connect is from the Internet. The firewall is off and so is AppArmor.
View 9 Replies View RelatedThe wireless disconnects intermittently and asks for the WEP password again and again. The network adapter is intel wireless/pro 3945 ABG. Please let me know what I can do to avoid this issue. When using 9.10 there is no issue in wireless connection.
View 2 Replies View Relatedusing Hardy Heron on a old Thinkpad T41.This is a fresh install system and I noticed it kept dropping wireless connection. After google around, seems like this is a common problem? Then I switched to wired network, and turned out the same thing happens again. Looks like doesn't matter wired or wireless, it kept dropping itself from time to time.
fter checking syslog, I found something interesting...it kept complain eth0 is invalid, then it said it found a better connection?I found that extremely weird..
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Apr 30 06:24:32 support kernel: [ 961.236895] e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
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We have two recently installed centos machines, each running 5.5, and hosting an elastix pabx distro as well as a Virtual PC instance. On both machines, the network adaptor fails completely every week or so. As they are remote machines, the only option we have when this happens is a manual reboot.
I might be barking up the wrong tree here, but the only significant difference on these machines to others we have deployed is the Virtual PC instance. The machines have dual ethernet ports, with one assigned to the virtual PC. When the network failure occurs, it does not effect the virtual machine, which continues along merrily.
My expert colleague does not think so, but can anyone think of any way that our configuration could be causing the problem? If not, does anyone have any ideas on what the problem could be, or where I would start looking for information on the machine to debug the issue?
We are having an issue where our network connection is dropping on our server. Everything was working for about a month without issues then suddenly we experienced a network outage. Here is what I found in our logs. Rebooting the machine was the only way to have everything come up.
Oct 16 09:20:59 server2 kernel: [2612816.936085] ------------[ cut here ]------------
Oct 16 09:20:59 server2 kernel: [2612816.936101] WARNING: at /build/linux-FpPMO6/linux-3.2.54/net/sched/sch_generic.c:256 dev_watchdog+0xf2/0x151()
Oct 16 09:20:59 server2 kernel: [2612816.936106] Hardware name: ProLiant DL380p Gen8
Oct 16 09:20:59 server2 kernel: [2612816.936110] NETDEV WATCHDOG: eth0 (tg3): transmit queue 0 timed out
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We have the same exact server, running the same exact debian version for over a year with no issues.
I recently upgraded a 11.0 installation running on Xen Server to 11.3. I am experiencing frequent network disconnections now. The ip address and default gateway is assigned statically. However, the system seems to ignore the default gateway after a while. Then after several minutes it seems like it comes back.
Code:
root@poe5e:~/ > route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.111.0 * 255.255.255.0 U 0 0 0 eth1
172.16.107.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 0 0 0 eth0
loopback * 255.0.0.0 U 0 0 0 lo
default 172.16.107.254 0.0.0.0 UG 0 0 0 eth0
root@poe5e:~/ > ping 172.16.107.254
PING 172.16.107.254 (172.16.107.254) 56(84) bytes of data.
64 bytes from 172.16.107.254: icmp_seq=1 ttl=255 time=0.515 ms
64 bytes from 172.16.107.254: icmp_seq=2 ttl=255 time=0.484 ms
64 bytes from 172.16.107.254: icmp_seq=3 ttl=255 time=0.496 ms
64 bytes from 172.16.107.254: icmp_seq=4 ttl=255 time=0.473 ms
^C
--- 172.16.107.254 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2997ms
rtt min/avg/max/mdev = 0.473/0.492/0.515/0.015 ms
root@poe5e:~/ > traceroute orl3akm1n
traceroute to orl3akm1n (10.111.19.19), 30 hops max, 40 byte packets using UDP
1 172.16.107.250 (172.16.107.250) 0.405 ms 0.398 ms 0.357 ms
2 * * *
When my sessions suddenly die and I have to coax it into routing correctly again.
I'm using OpenSUSE 11.4 and the GNOME 3 packages in the GNOME:STABLE repository. I maintain an application and have a remote Mercurial repo hosted at BitBucket, which requires SSH to do any push/pull operation.
My passphrase is just that -- a phrase, not a word -- and it's too long to type accurately without seeing it. I cut and paste it from a web page. When I'm asked by a console app for the passphrase, I can do that. The GNOME SSH passphrase dialog does not allow pasting or dropping, so I can either try to type it or hit cancel. Normally, ssh-add provided a way around this; it would ask you for the phrase on the console, and I could paste it.
This doesn't work in GNOME 3. ssh-add still asks me for the passphrase, but when I try any operation that requires the key, the dialog pops up again. How is it possible to get ssh-add to work, or (preferably) get rid of the dialog?
Today my eth0 has intermittently shut down a couple of times without obvious cause from router or modem which appear normally lit. This happened a month or two ago soon after an update and them went away. I have unchecked ssh in the firewall settings as it is not needed but this has never been a problem. In the block of code there should be one attempt to graphically restart eth0.
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I'm using Ubuntu 9.04 64 bit on an Asus laptop and the wireless connection disconnects randomly for a while and keeps searching for the signal. When it finds it I have to put in my WEP key again to get it to connect sometimes only once or sometimes 2 or 3 times. This is getting quite annoying.
View 9 Replies View RelatedThis is weird. I will be working on the internet with several tabs open and all of a sudden the pages won't update. I can't go anywhere - it's like I lost the connection. I am also downloading bittorrents with uTorrent running with WIne and that doesn't seem to be affected. I also have gPodder and I tried to update podcasts with that and it also hangs up as if it can't connect. The only way I have been able to solve this has been to reboot (which I just did).
View 3 Replies View RelatedHaving major wireless issues with Linux. I have DSL and had a Westell router/modem combo and my wireless would stay up for no more than 15 mins at a time even while idle, and in order to get wireless back I have to reboot and then I can get another 5-15 mins of wireless before it drops. When it drops it prompts me for my wep key and wont accept it yet if I reboot it catches the wireless right away for a very short period. So I go out today and spend over $100 bucks on a Netgear dgn2000 thinking it would fix the problem... Nope I am still in the same boat as I was with the Westell.
I am not seeing my router model listed under the wiki link sticky.. (Edit) thought I installed ndiswrapper, it was it was in my downloads anyway I can't install it I get the following error (Not a valid driver .inf file.)I have tried 3 distros and have the same problem. I went to Netgears site in search of Linux drivers but all I found was the firmware updates. Could some one please shed some light on what I need to do to get up and running?This is a new laptop and I am pretty annoyed with myself for formatting it out of the box rather than reading up a bit more about Linux (been using for one month).I don't understand it Ubuntu 10.9 ran wireless perfect on my older system, (full install) and I have no trouble with my lap top that is running Windows.I really hope to get this resolved I really enjoy Linux and I don't want this to be the one handicap which would force me back to Windows, that would be very upsetting
Lately I have been using my window's partition due to the fact that 10.04 drops my wireless signal every 5-10 minutes, but today I downloaded the new updates and that seems to have fix the issue with the dropping of the wireless connection. Now the only problem is the internet is so slow when trying to go to webpages it times out. I have opened up firefox gone to about:config and changed the necessary lines, but still dreadfully slow.
View 2 Replies View Relatedget this working all of the time instead of the constant dropping that I experience -- i've read a lot of the posts and think i have the right driver installed but there never seems to be a major improvement.Running a p4 2.8 ghz system on lucid and have the most recent kernel installed.Thought I'd give it a last attempt with help before chucking it and getting an adapter that's more compatible
View 2 Replies View RelatedI'm running ubuntu 10.04 on my laptop with broadcom BCM4322 wireless card.Basically what keeps happening is my wireless will stop working, then network manager will notify me that I have lost signal. It will then try and reconnect, but it never seems to be successful. The only way I can get the wireless to work again is if I disable wireless then re-enable wireless (or do a complete system restart).
However, it does not seem to have this problem at home. The only difference I can think of from home and school is either encryption types (the university uses WEP, I use WPA) or the fact that at home there is only one access point and at university there are multiple access points all with the same SSID.Anyone have any idea how to make my laptop stop dropping connection all the time?
My wireless connection keeps dropping is very unstable, signal strength goes up and down here is the info i got from the terminal
*-network:0
description: Ethernet interface
product: 82801DB PRO/100 VE (MOB) Ethernet Controller
vendor: Intel Corporation
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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]
View 3 Replies View RelatedEveryone who is experiencing this issue please click the link saying it effects you and add a comment so the bug will get the attention it needs. It seams like many people are facing this issue. [URL]
View 1 Replies View Related