Internet connection is very slow on Karmic Koala-Solution-

One of the big bugs ( on Ubuntu 9.10 Karmic koala is the slow internet connection, i have a connection of 25Mo/s and even that it take too long to load a page, at the begining i tought that was something wrong with my router or with my wireless card untill i discovered that is a known bug in karmic koala and there are many people fronting th same problem as me. I found a solution somewhere, and has worked for me for the moment. Please try it and report if worked for you also.

1. Right-click on ‘Network Icon’ (located at top-right panel by default) and click on ‘Edit Connections’ to open Network Connections Manager.

Network Manager :

2. Choose the type of connection you have. For this example, in my case “Wireless”, select the connexion (My case Auto unixmen) and click Edit

3- Inside editing ” auto unixmen wireless” click on ‘IPv4 Settings’ tab.

4. Under ‘IPv4 Settings’, change the ‘Method’ to Automatic (DHCP) addresses only.

6. Put these nameserver addresses as your ‘DNS Servers’:,

7. Click ‘OK’ and reboot your machine. You can then visit to confirm you are using OpenDNS. (Need registration)

8. NOTE:

To avoid having your settings get revoked after reboots, or after periods of inactivity you may need to make the following changes via the command line:

$ sudo cp /etc/resolv.conf /etc/
$ gksudo gedit /etc/dhcp3/dhclient.conf
# append the following line to the document
prepend domain-name-servers,;
# save and exit
$ sudo ifdown eth0 && sudo ifup eth0

You may be required to change eth0 to your own network device’s name if it uses a non-standard name.

Links :

  • Bruno

    9.10 with all these issues is sounding very much like windows vista.
    I guess they wanted to make something diferent, but did not go as good as they thought it would, comparing with other ubuntu releases.

  • anony

    More likely it is ipv6 (tho ipv6 fans will ofcourse boohoo that)

    to verify:

    lsmod |grep v6

    on debian systems to disable:

    add the word ‘off’ to “/etc/modprobe.d/aliases” file ; then reboot and voila

    alias net-pf-10 off ipv6

    also go into firefox, use about:config
    search for ipv6 and tell it false.

    I truly doubt you have an ipv6 router, and most likely your ISP isnt using it, but opendns from what I recall does, which is why you ‘think’ your issue is fixed.

    Long live Slackware :)

  • Coda2009

    Manual entry of dns drastically sped up my internet experience. Thank you, and please report when we learn why dynamic is not properly functioning. – C

  • Anonymous

    Why do you call it a “connexion”? Are you 10 years old?

  • zinovsky

    [quote=zinovsky][quote=Anonymous]Why do you call it a "connexion"? Are you 10 years old?[/quote]
    Sorry i made a speling mistake, i used the word in french "Connexion", if you have to manage 5 languages you will make for sure these kind of mistakes
    :)Thank you[/quote]

  • Andrea

    If changing the dns fixes it, it’s not ubuntu’s fault. Either the fix is not appropriate or you don’t know what you are trying to fix. Not really helpful this kind of blogging,

  • zinovsky

    I can say that is a temporary fix for the issue, i have many operating systems installed on the same machine, and all working just fine, when it comes to karmic the connection become 2 slow,first i visited some forums to see if someone else is fronting this issue and i found many ones with same issue in karmic, most diden`t have a solution for the problem, Until this bug is resolved will use this temporary solution, for me worked fine, for others too. Read the bug comments here : [url][/url]

  • zinovsky

    Can be that the wireless drivers are broken in karmic koala, i agree with you that Slackware is most stable also for debian.

  • Martin

    I second that. Your ISP should provide you with appropriate nameservers.

    If IPv6 compatibility bothers you I suggest you look into uninstalling related packages, just a thought..

  • David Hyde

    I third that. Your slow DNS has [u]ABSOLUTELY NOTHING[/u] TO DO with Ubuntu, and posting this erroneous information is [i]completely irresponsible.[/i]

  • Arup Roy Chowdhury

    There is no ipv6 issue, when Ubuntu boots and doesn’t find any ipv6 routers present, its disabled. Btw, the blocking ipv6 solution given by a posted above doesn’t work since Jaunty as ipv6 support is built into the kernel. To disable it totally, you have to add these following lines to /etc/default/grub

    In place of GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash” make it GRUB_CMDLINE_LINUX_DEFAULT=”ipv6.disable=1 quiet splash”

    And to the person criticizing for spelling in the post above, let me remind you that outside the western world English, however you may think is not the standard language so if there was an error on the author’s part, for pete’s sake, grow up. This isn’t a language or grammar forum, this is after all a tech forum.

  • Tim

    I left rebooting behind with win 98. Just alt+F2 and killall gnome-panel.

  • Latin

    Regarding Wikipedia and other on-line dictioanries

    Connexion is the original and variant spelling of “connection”, common until at least the 19th century, and still used in British English. It is derived from the Latin connexio, hence the spelling, unlike most words ending in “-ction” which are derived from Latin words ending in “-ctio” (e.g. “protection” from protectio).

  • skippy

    Mmm…since when do you have to reboot Linux to change network(or pretty much any) settings?

  • Grizmawe

    You need to reboot because it is a kernel setting.
    You cannot make changes to kernel settings and have them apply live (unless you use kexec or ksplice, but they wouldnt work for this, rather kernel patching and new kernels)

  • Anonymous
  • C.Loer

    This has sped up my connection a lot, though not anywhere near perfect. I agree with zinovsky that this is a good temporary fix. If a real fix comes, I’ll fix this issue. Until then, I’m happy with this solution.

  • StevenWang

    Thank anony

    Under firefox, I try about:config
    then disable IPV6

    After restart Firefox, all problem gone!!

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