Ubuntu Networking :: Loss Of Wifi After Reboot?

May 12, 2011

I have a Compaq Presario M2000 with a Broadcom BCM4306 wifi card with Ubuntu 11.04

I did the following commands and the wifi works perfect, but after reboot I have to run the commands again?

Code:
~$ sudo apt-get install b43-fwcutter
Code:
~$ sudo apt-get install b43-fwcutter firmware-b43-installer

[Code].....

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Ubuntu Networking :: Lose WIFI After Reboot?

May 31, 2010

I have just removed ndiswrapper and installed Realtek RTL819se!! How ever after I restarted I lose my wifi and have to do change directory to use ./wlan0up to get it working again.

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Slackware :: Data Loss After Sudden Reboot On Xfs

Oct 25, 2010

I have a laptop running slackware-current. The disk is /dev/sda and the root 'sda1' is xfs formatted (there is also linux swap at sda2).

recently I was trying to setup openvpn and had to copy a folder with configuration files from /usr/doc/openvpn_<version>/easy-rsa to /etc/openvpn.

I am sure the copying completed cause I got a prompt, but a few seconds later the battery died on me. When I got mains and powered it up, I could see the directory I copied under /etc/openvpn, and the files where all there too. but they all contained nothing. i.e. they had a size of 0.

I read [URL] Fthat an external journal filesystem for root is not supported. I am not sure If it applies to my situation though. As in does it use an internal journal instead?

and the bottom line is: shouldn't the copying have completed successfully? shouldn't I be worried, that this copy failed?

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Fedora Networking :: Get Wifi To Work After Reboot?

Dec 25, 2010

I ran yum broadcom-wl and installed the driver for my card no problem. I connected to the internet just fine using my wifi thereafter.

When I shut my laptop down and booted sometime later, the wireless connection was gone and I didn't even see a wireless adapter in the networking applet.

I tried to run insmod wl and insmod wl.ko and that failed.

So... after using yum to install the broadcom drivers, how can I make that install 'permanent'; so I don't lose my wireless adapter each time I reboot?

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Jul 27, 2011

I turned down my txpower with the command: sudo iwconfig wlan0 txpower 3 Which works to fine turn down my broadcast power from the default value of 15 dBm to 3 dBm. But it is reset every time I restart Ubuntu 11.04 to the default value of 15 dBm. How do I save my modified txpower settings so they don't reset after a restart? It is really annoying having to re-enter the command every time I reboot my computer!

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Jun 9, 2010

I have a Hardy which last night asked for updates that included kernel changes. Today I find I no longer can connect using WIFI and have no sound. The GUIs are just not there and it's as if the controllers themselves have disappeared. For example lshw -C network reveals a Cisco Airon Wireless, but it's not listed as a wireless device, just as network controller.Can anyone advice me on how to approach this? Is it possible to revert changes or something?

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Jun 6, 2010

After serveral reboots without problems. My Xubuntu 10.04 LTS now asks for my wifi security keyat every boot. Somehow It looses it.

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Ubuntu :: Wifi Card Is Unusable After Reboot?

Nov 8, 2010

my bcm 4312 wifi card gets disabled after each reboot, now that ive installed compat-wireless patched for mac 80211 frag attack... in order to get my wifi card fired up again i have to browse tom my compat-wireless source folder in /home/user/Downloads/compat-wireless and issue the commands sudo make wlunload and then reload my wifi driver via sudo modprobe b43. is there any way to fix this problem? or furhter troubleshoot here is what dmesg says on boot:

Code:

[ 22.425475] b43: disagrees about version of symbol ssb_device_is_enabled
[ 22.425481] b43: Unknown symbol ssb_device_is_enabled (err -22)
[ 22.432766] b43: disagrees about version of symbol ssb_pmu_set_ldo_paref

[code]...

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Apr 9, 2010

I have 3 Dell Precision M4400 machines. After getting updates yesterday or today, I get random network dropouts like crazy, on wired or wireless. On one machine I was able to turn off ipv6 in grub and reboot, and it works now. However on the other 2 machines, still have the same problems. All 3 are running 9.10 64 bit. Is there a way I can back out the updates so the network works again? Anyone else see this behavior after updates today?

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Ubuntu Networking :: Loss Of Wireless Connection?

Mar 11, 2010

I have a new Toshiba Satellite L450, and decided to run Ubuntu, which is new to me. I am running a 64 bit Karmic, and there is no driver that works. So, to make a long story short: a friend helped me get a driver on my Desktop, namely: rtl8192se_linux_2.6.0100.1012.2009_64bit.tar.gz We had it working, but when I let in the first large batch up updates, it kicked the driver out. I found instructions, installed it again. I let in the next updates, and it kicked out again, and this time the instructions don't work. So, I have two sets of questions:

1. Will updates always undo my wireless? Are there certain updates I should avoid if I want the wireless to stay up and running? (I just assumed the thing to do is just get the updates -- though I am guilty of having no idea what they were about.)

2. Did the updates cause one of my instrucitons to no longer work, or need to be modified?

They were as follows:

sudo apt-get install build-essential
cd ~/Desktop
sudo tar -xvzf rtl8192se_linux_2.6.0100.1012.2009_64bit.tar.gz
That 'sudo tar -xvzf...' operation is the one that stops me. Is there something to change in that line? It goes on:
cd rtl8192se_linux_2.6.0100.1012.2009_64bit

[Code]...

this worked the first time I tried it. I posted this earlier under 'hardware', and do not know how to get that post off, so I typed it here once I realized.

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May 29, 2010

I am just starting my adventure into Ubuntu. After installing and configuring Shrew Soft in Ubuntu 10.04 64Bit, I am having some serious packet loss issues. The LAN is wireless, however the only packet loss I experience is over the tunnels. I have tried different algorithms, and it seems as I fiddle with the MTU client side, it clears a bit, but the best I have managed is 23% loss average.

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Jul 8, 2010

After having my usb wifi adapters working fine for some time, they stopped working and I can not get network connectivity.

Some one else was using my box and they reported seeing a kernel panic and then rebooted the box. Now there is no connectivity through the wifi interfaces.

I have seen the kernel panics related to this driver before, but usually a reboot has no ill effect.

Code:
root@Algalon:~# iwconfig wlan0
wlan0 RTxx70 Wireless ESSID:"a800" Nickname:"RT3070STA"
Mode:Managed Frequency=2.412 GHz Access Point: 00:0B:86:9A:08:80
Bit Rate=54 Mb/s

[Code].....

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Mar 8, 2010

I have a hp dv3 laptop which dual boots Win7 and Ubuntu 9.1 64 bit. I have no issues with my wireless adapter in Win7, but I lose connection after a couple of hours in Ubuntu. When connection is lost it is not possible to view any wireless signals, the adapter is basically turned off. The only way to restore the connection is to reboot, then Ubuntu will again automatically connect to my WP2 encrypted router. My wireless adapter is a AR928X made by Atheros.

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Mar 16, 2010

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A number of restarts with the kernel I normally use (2.6.31-19) including one in recovery mode, yielded no change, but a restart with the 2.6.31-20 kernel resulted in connectivity. Finally, perhaps by chance, wireless started to work again on the 2.6.31-19 kernel, after I once booted into the Mac OS, and then back into Karmic. How I might go about diagnosing, obviously in hindsight, what happened? I suppose I should look in the log files, but I have no idea where exactly, and what to look for.

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Ubuntu Networking :: Avahi Causing The Packet Loss?

May 5, 2010

I got a new X201 which is running Ubuntu 10.04. While at home, everything is fine, at work, I encounter some issues with wireless. the signal cuts in and out repeatedly.Here's the output of ping. I set it to ping a server every 90 seconds, 10 times. So this is a snapshot of 15 minutes of network activity...

Code:

PING (REDACTED) bytes of data.
64 bytes from (REDACTED): icmp_seq=1 ttl=252 time=1.50 ms
64 bytes from (REDACTED): icmp_seq=2 ttl=252 time=2.13 ms
64 bytes from (REDACTED): icmp_seq=3 ttl=252 time=1.38 ms

[code]....

Also I tried this (from a 2 year old thread which was most relevant solution I could find):

Code:

Changing AVAHI_DAEMON_DETECT_LOCAL=1 to AVAHI_DAEMON_DETECT_LOCAL=0 in /etc/default/avahi-daemon has got rid of the irritating pop-up. Basically, every 5 minutes or so, for a solid 60 seconds or so I get no signal. I've tried updating the kernel, and doing apt-get remove avant-daemon, but still have problems.

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Jun 23, 2010

I am simulating a TCP/FTP to TCP/FTP network and trying to monitor the packet loss.

I am able to monitor and graph data regarding the TCPSinks' bytes received, but I can't monitor packet loss.

Why is it that the TCPSink Agent has a variable for bytes (bytes_) but not one for monitoring packet loss?

Do I have to monitor the packet loss from the queue? If so, how do I write code for this?

Below is part of the code for monitoring bytes received from sinks if anyone was interested.

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Jan 6, 2010

I'm using kubuntu 9.10 desktop edition as a server and I set the IP statically, what happens is that when I ping it from another machine on the same network, I get intermittent packet loss (up to 80% and sometimes even higher). When I ping any other machine on the local network everything's fine with 0% packet loss. Packets go directly through switch, no router or anything in between.

I suspected wiring issues, but that doesn't seem to be the problem after I changed the wiring. I was connected to wireless and suspected that but no go either. Same thing when I turn wired. I just changed the ethernet card suspecting drivers but that's no good either. Iptables is a cleanslate installation, it's totally empty.

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Feb 27, 2010

Just want to know if my connection will be good for voip like skype...

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Aug 5, 2011

I have ubuntu lucid running on Dell 230 PC, linksys WPN600 N wireless PCI network card connecting to a Cisco E3000 dual channel router.

Kernel: 2.6.32-33-generic
Installed Ralink driver v2.4.0.0

iwconfig shows that the bit rate is 130Mb/s and link quality is 98/100. I'm using the wcid network manager instead of defaul gnome one. I'm getting lots of packet loss and performance is very bad. The connection is practically unusable. I've tried installing the compat wireless backport package but that did not work at all.

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Jul 3, 2010

My laptop has an internal wireless device and a button to turn it on/off, but since it has bad reception I use an external USB wireless adapter.The problem is that if I turn the internal wireless device off using the button, it also turns the USB wireless adapter off.Is there anyway to use the killswitch (the button) only for the internal wireless device?This only started to happen in Ubuntu 10.04.

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Aug 29, 2009

I have only had a few weeks worth of experience with linux, so I'm probably considered a newbie at this but I felt like giving it a shot. I just configured my new Toshiba Satellite A505-S6969 to jaunty. Most of the transition is going well but I'm stuck with a few issues, one of which is getting my wifi to work. Right now I'm working off of an ethernet cable.spci returns

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[code]...

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Installed ubuntu 9.10 dual boot with win7 yesterday. Everything working but Wifi. Wifi works fine with Win7. No Wifi in Ubuntu. Very confused. I have info from the wifi trouble ticket post.There does not seem to be a driver for this card anywhere.

lawrence@lawrence-laptop:~$ lspci
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[code]....

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Jan 23, 2010

I try to setup a locale network between 10 (Web) Servers (openSuse 11.2), each Server is connected to the internet (eth0) which works fine on all servers.

A 2nd NIC eth1 (1GBit rtl-8169) on each Server is connect to a Switch and should function as a LAN. I installed/configured the 2nd NIC with yast, and than added a route for the local network (192.168.20.0) to use eth1. So far every thing works (ssh for example), but I have a packet loss of 10%-60% (ping) on the local network, and I cant find the reason for the packet loss. I already installed a Debian Lenny on 2 Servers (just to test) but I have the same problem on Debian.

No firewall or any other application is in the way. With tcpdump I could figure out that the packages are send but never show up on the destination server.

I put some more information about how I configured the LAN below. I have not done this my first time and from my experience if something is wrong with the network configuration (wrong routing, firewall in the way, etc.) this usually leads to a packet loss of 100% or the destination is simply not reachable.

The 2nd NIC is installed with either yast on suse , or by editing /etc/network/interfaces on debian. The Kernel module rtl8169 is loaded.

They are configured with the following values:

Route is added by:

Output example. of ifconfig :

Output of route (same on all servers):

Output of ping:

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Ubuntu Networking :: Very Slow WiFi Using Broadcom Wifi Card?

May 12, 2011

get WIFI working on my Dell D600 with Ubuntu 11.04 freshly installed. I some limited sucched following the this post t=1621331 this got the card working but it was very very slow over 70% packet loss to the WIFIrouter. 1. Machine details Dell Latitude D6002 Wireless Broadband and Chip setlspci -nn | grep Broadcom - 02:03.0 Network controller [0280]: Broadcom Corporation BCM4309 802.11a/b/g [14e4:4324] (rev 02)3. Check interfaces

eth0 Link encap:Ethernet HWaddr 00:0b:db:e0:1c:5b
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0

[code]...

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Apr 22, 2010

I have problems with my network speed when i ping my proxy server I end up getting a high packet loss generally more than 30%.I have tried to use various network monitoring softwares like etherape, wireshark, tcpdump but I am not able to get to the bottom of the problem.basically I am trying to find out where the lost packets are going.

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Fedora Networking :: Wireless Modem Connectivity Loss ?

Dec 10, 2010

The problem is I have a wireless Belkin router which I can connect to, but after being connected for a few minutes the net disappears (cuts from the router) and my laptop will have to reconnect again to the router for internet to work again. After a few minutes (or seconds in some cases) the connectivity loss will happen again over an over.

How to fix this problem or some things I can try, I've tried updating to two different firmwares, two different channels and resetting the router. The biggest problem I find is that this happens on both my laptop, another laptop in the house and also my tablet PC but doesn't happen on two other laptops in the house, I've also tested with windows 7 and Ubuntu with my laptop.

My laptop wireless card is Atheros AR9285 802.11b/g/n WiFi Adapter

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Dec 28, 2010

I have a following configuration: 4 PCs (say, A, B, C and D), running Ubuntu or Debian, interconnected using a gigabit switch, which is connected to the Internet. Two machines (say, A and B) also have a direct private connection between them (provided by another pair of NICs).

Now, when I test the connection performance with iperf, the results vary. The private connection between A and B performs well - about 930Mbps using iperf's UDP test. Between C and D it is about 800Mbps which I find tolerable. Packet loss when running these tests is negligible.

However, when I run iperf between any of {A,B} and {C,D}, the performance significantly drops as there is a huge number of lost packets.

For example, here is the result of testing between A and C:

Why is there such a large number of packets which are generated, but lost somewhere?

A<->B private link works fine, so system level parameters on both A and B are correct. Furthermore, C<->D works ok, so I guess I shouldn't blame the switch.

Is there a per-NIC configuration that I should check or it smells like a hw problem? Problematic NICs on both A and B are of the same type - Allied Telesyn AT2916T.

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