Help answer threads with 0 replies.
Go Back > Forums > Linux Forums > Linux - Networking
User Name
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


  Search this Thread
Old 12-04-2011, 06:05 PM   #1
LQ Newbie
Registered: Dec 2010
Location: NSW, Australia
Distribution: Xubuntu 12.40
Posts: 18

Rep: Reputation: 1
Wireless dropout - automatic restart??

I have been using both Kubuntu and Xubuntu with a Belkin F7D1401au Wireless modem for several weeks. Everything works well and fast - was very easy to set up.

However I get a few dropouts - maybe 1 or 2 a day.

Q1: Why? What causes dropouts? How can I avoid them?
Q2: How can I set things so that the connection restarts automatically instead of me having to restart from the taskbar icon?

I cannot see any automatic restart setting either in the modem or in the connection settings.


Old 12-04-2011, 06:51 PM   #2
LQ Guru
Registered: Apr 2005
Posts: 5,818

Rep: Reputation: 1003Reputation: 1003Reputation: 1003Reputation: 1003Reputation: 1003Reputation: 1003Reputation: 1003Reputation: 1003
Have you looked in any of your log files for any warnings or errors? I would start there, and see what your system is telling you when the dropouts occur. Without looking at them, you can't really tell what exactly is happening. Look at your dmesg output, along with your /var/log/messages file.


Old 12-04-2011, 11:44 PM   #3
Senior Member
Registered: Dec 2009
Posts: 1,387

Rep: Reputation: 173Reputation: 173
Hi, there may be problem with 100% cpu usage at time of dropout.

however you can try to restart connection with following code that detect internet connection (in iwconfig) and
restarts nm-applet in while loop

iwconfig wlan0 | grep ReplaceWithYourSSID
if [ "$?" -eq 0 ]; then
echo internet available
echo "it didn't FOUND internet"
killall nm-applet
sleep 1
Old 12-05-2011, 07:31 PM   #4
Registered: Apr 2009
Distribution: Debian testing
Posts: 555

Rep: Reputation: 101Reputation: 101
However I get a few dropouts - maybe 1 or 2 a day.

Q1: Why? What causes dropouts? How can I avoid them?
In order to crack a WPA encrypted wireless network, one needs to bump a connected computer off the network, Windows will automatically reconnect when the connection is lost, this is where the hacker collects the only packets that will have the key, which is the four way handshake before a connection is established.
It might be a good thing your OS does not automatically connect, if the hacker is impatient, he/she will give up within a minute and try something different later to try and get those packets from the four way handshake.
Old 12-06-2011, 07:13 PM   #5
LQ Newbie
Registered: Dec 2010
Location: NSW, Australia
Distribution: Xubuntu 12.40
Posts: 18

Original Poster
Rep: Reputation: 1
Thanks for all your posts.
I cannot find anything in the error logs that is relevant.
I have not had the problem for the last few days so it is not a problem now.

I did not think of a hacker - maybe that was it. I will change the WPA-PSK key to something stronger that what it is now - just for protection.

Again, thanks for your help



kubuntu, wireless, xubuntu

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ubuntu automatic Restart mscsiva Linux - Newbie 3 08-26-2010 03:22 PM
Automatic Restart Fracker Linux - Server 1 05-25-2010 06:25 AM
automatic restart of apache while booting dianarani Linux - General 2 06-12-2007 06:45 AM
Automatic restart cmgleipzig Linux - Newbie 6 07-14-2004 11:44 PM
Automatic Restart Nezar Linux - General 11 09-24-2003 03:21 AM > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 01:36 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration