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.
View 1 RepliesI'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%.
I have just set up an FC 13 box for a small network application. At the core, the application is supposed to receive some data over a multicast on my local network. However, for some reason, I am not being able to receive any multicast data on this machine. Other machines, on the same network (connected on the same layer 2 switch) are receiving the multicast just fine. I have tried the following things:
1. ensure that I am joining the multicast on the correct interface: the machine has only one ethernet card. Also, after starting my application, I use netstat -g to check for group membership. The multicast subscription shows up fine.
2. ensure there is no error in the program: the program works fine on my person linux machine
3. ensure that the multicast is actually available: it is available on all other local machines. I also wrote my own small broadcaster. data from this broadcaster (running on the same box) is available to other machines but not to my own listener program.
4. no firewall/filtering settings on the layer2 switch
5. TTL setting on the broadcast: have tried changing it from 1 through 5 with no effect. Note that even if the broadcast is coming from the same machine, my machine does not pick it up while other machines on the network do so.
I suspect this has to do with some settings on the network card itself. Below is the output of /sbin/ifconfig on the card:
eth0 Link encap:Ethernet HWaddr 00:08:A1:67:BBA
inet addr:192.200.20.32 Bcast:192.200.20.255 Mask:255.255.255.0
inet6 addr: fe80::208:a1ff:fe67:bbca/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
I am doing work on serial port. I want to send/receive data to/from Microcontrolar through serial port. But I don't know how to initialize, receive and send data to Serial port. i am new in fedora so i hav'nt any deep concept of fedora.can anyone send me C code , which communicate through serial port in fedora (or atleast help me). I am using Fedora 11.
View 6 Replies View RelatedHow I can send and receive SMS via CDMA Connection. I have tried Gammu (hangs) and Gnome-Phone-Manager (Can't run on GTK3). Gnokii? Well ... I'd like to hear from someone who has succeeded with it on F14. I don't like having to boot into Windows to check my Phone Credits
View 11 Replies View RelatedProblems with Bluetooth. The dongle appears to be working, but then it craps out on me after only a few minutes!
I'm using the blueman-manager GUI to connect to my cell phone. If I load blueman-manager almost immediately after connecting my dongle, I can use it for a few minutes, but only long enough to add my phone, pair it and mark it as trusted. Certainly not long enough to send or receive a single file, though. Eventually and inevitably, the connection breaks, blueman-manager hangs/freezes up, and I start getting errors in dmesg.
Here's all the relevant diagnostic stuff...
Code:
Code:
Code:
I added the MARK myself to separate where the dmesg output stops immediately after plugging in the dongle from what appears after the connection is broken. It's right when that timeout error happens that the connection severs itself, and the error usually repeats itself several times.
Even if I just connect the dongle and not do anything except wait a few minutes, after a few minutes that timeout error will still happen. I'm running fluxbox and I don't believe I have any automounting programs, so there wouldn't be any interference from something like that.
I am using ubuntu 9.04. I have configured Evolution on my laptop, but it is not working.
View 1 Replies View RelatedI am would like to configure postfix to send and receive email across Ethernet (just for now). I have two machines with postfix installed both using Ubuntu 10.04 directly connected with an ethernet cable. I have successfully configured a machine to send email to gmail, however i have been unsuccessful in having these machines send email back and forth. I have been interested in setting up a little mail server at home and have just been trying some simple projects with postfix to start with. At this moment i am using ip addresses and am not concerned with using a dns server
machine A: has a fixed ip of 10.137.202.1, hostname = mail.me.com,
machine B: has a fixed ip of 10.137.202.20, hostname = mail.ubuntu.com
in the /etc/hosts file I map each hostname to ip address receptively (not sure if a good idea, but at this point I have been trying everything)
So I will execute from Machine B
echo "Here is a message" | mail -s 'Hello' cmd@[10.137.202.1]
I currently get from mail.log timed out while receiving the initial server greeting. I get from mail.err valid hostname or network address required in server description #[10.137.202.1]. Obviously when I run the mail command from cmd user i do not receive anything. I can receive mail from myself if from machine A, I sent an email using the command above. I would just like to send email from machine B and receive it on machine A via direct Ethernet connection. I have been through postfix documentation and have also read the postfix definitive guide and have had no luck.
Here is a recent main.cf as I have tried getting this to work (this is for machine A however, similar for B)
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
myorigin = /etc/mailname .....
I face in getting my wireless connection work. I am able to establish connection with my router and browse router configuration pages successfully. However, trying to access any other internet address (through browser or ping etc) results in intolerable poor performance (70% to 100% packet loss in ping). Ethernet connection (eth0) works perfectly though. Am furnishing the details below:
Netbook: HP Mini 311
Product No: VM257UA#ABA
Model No:311-1000NR
Ubuntu Netbook Remix:
[Code]...
I need to receive a number of raw ethernet packets (say, 100 packets) into a user-mode accessible buffer large enough to hold all the packets. The way I have done this so far is by looping over the recvfrom() system call 100 times, passing an incremented pointer addressing the location in my buffer to store the packet. Is there a way to receive the 100 packets into my buffer with one system call, perhaps by instructing the kernel to DMA the 100 packets into my buffer?
View 1 Replies View RelatedUsing 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.
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.
I created a new account on laposte.net.
This account can receive messages but cannot send any from Thunderbird.
[url]
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.
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..
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 ?
View 1 Replies View RelatedI'm trying to receive data that is being broadcast on address 224.0.1.1, 224.0.1.2, 224.0.1.3, 224.0.1.4. ports are 1201, 1202, 1203, 1204 respectively. I can see the data using wireshark but can not get my program to receive the data. all firewalls are shutdown. iptables is not running, i've set net.ipv4_icmp_ignore_broadcasts = 0 and still no luck.
View 1 Replies View Relatedis anyone familiar with MRTG? i have it up and running just fine, but i have a bunch of interfaces showing up with no data and i want to weed those out. how to specify which interfaces i want to receive and display data from?
View 1 Replies View RelatedI'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.
When I log into my ubuntu 10.04 after booting my computer, I receive a 30-40 second lag before I can actually log in. During this lag, I can move the cursor and the login background is shown, but the computer seems to be doing nothing. It is as if there is a sleep command before I even log in. I am using a Sager 2096 computer but I got this computer for free and it did not come with the specs. I had installed a 64-bit version of Ubuntu because this computer has a 64-bit architecture. However, whenever I install software, it always has to install the x86 version because the x64 is "not supported." Perhaps I have a mix of 32 and 64 bit programs and that is what is screwing it up?
View 3 Replies View Relatedi m using RHEL5 on my server machine and open suse 10 on my client machine.both system ping each other, firewall is off of my server machine,i put a file from my client to my server machine using scp command but ftp command is not working when i want to open connection i receive a message "connection refused".what can be the issue?
View 5 Replies View RelatedI am connected to the internet with a Rogers Rocket Stick, when I want to check my mail in Evolution the "send and receive" tab is not highlighted. It was working yesterday when I was connected through wireless why is that and how do I fix it ?
I installed Ubunto remix on a Netbook but I can not connect my Laptop with ubuntu to my Netbook with ubuntu, both these computers are connected on the network, it asked for the password to be able to connect on both computers but I cant get the two to communicate with each other .... yesterday when I still had windows xp on my Netbook I had no problem connecting the two computers ...
I have just installed Ubuntu for the first time, and I installed sucessfully World of Warcraft, but I'm noticing some networking issues where my whole network connection seems to pause for about 5-10 seconds at a time, which I finally realized when I played WoW. So i was curious where the settings are that I can change to possible eliminate that, or what others have done to increase their network throughput on their cards.
I'm running Unbuntu 9.10 64bit with the latest version of Wine from the Synaptic Package Manager. The router is a LinksysWRT54G3G-ST and my wireless network card I think is something made from MSI I don't see where to find out what drivers are installed on it I'm probably just looking in the wrong place or I'd give more information on the card.
Internet connection has been very unstable on my system latley. Think it was because of last update.
Basically for example i watch a video on ..... and it never fully loads. Even when i browse pages dont fully load and i must wait a few seconds before i press reload.
I am connected through cable. Network is working fine on other OS
I have installed ubuntu 10.04 on a new laptop siemens xi3650. I have Vista installed on it, and it works perfectly. On Ubuntu the wifi connection stops after a few seconds, and it wont reconnect until I restart the pc. The only mean I have to connect to internet is vie ethernet on ubuntu, or ethernet or wifi with vista. here is the results of the OS information:
Code:
genni@genni-laptop:~$ uname -r -m
2.6.32-21-generic x86_64
and the result of commands related to the network manager and the wifi connection. lsusb
Code:
genni@genni-laptop:~$ lsusb
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 002: ID 04b3:310c IBM Corp. Wheel Mouse
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
[code]....
I recently reinstalled 10.04. The wireless worked fine for a week or so, but not it cant get a connection for more than a few seconds. Ive downloaded Wicd, and after an eternity of trying to connect, it tells me that no IP address could be established. I can connect no problem when I plug in via Ethernet cable. Nothing when I try to use the wireless though.
View 2 Replies View RelatedI have an ASUS G50Vt laptop with Ubuntu 10.04 installed on it. I have a WiFi Link 5100 wireless device. I use these settings to connect to it:URL...My problem is, once I connect, within 30 seconds I lose my Internet connection. It goes on and off seemingly whenever it wants. Is there something I'm missing? Some kind of driver issue or something else I need to change?I can connect to the non-secure connections fine, just when I try to use the secure one it craps out. Halp?
View 6 Replies View RelatedI just installed Ubuntu Netbook 10.10 on my new Asus Eee PC 1215T, and I'm having trouble getting Internet access. When I first start up or reboot the PC, I'll have network access, but not Internet access. I'm connecting via a WAN at my university, and so the first thing you have to do is "register" the computer on the network (by visiting a certain website on their intranet) before it will allow you to access the Internet. Takes about 3 minutes to register it. I have enough time to *begin* this registration process, but I've tried several times and I can't get all the way through it before I mysteriously lose all network access. Unfortunately this is a brand new machine and came without any OS installed, so there's no way I know of to test whether this is defective hardware or not.
View 1 Replies View RelatedI have a problem with my wlan connection. it works for few seconds, then stops for few seconds and then starts again (without interaction from my side). I run Ubuntu 10.4 Lucid. The issue started few days ago. Using ethernet, there is no problem. The problem does not exist with other computers i have, there wifi and internet work continuously and flawless. I ping my wlan router. one sees that connection to the wlan router starts and stops every few seconds... (of course, internet connection then behaves analogous)
Quote:
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.30 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.21 ms
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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.
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