OK thanks for your help.

On 3 May 2011 14:49, Mathieu Trudel-Lapierre <email address hidden> wrote:

> Misoldgit, please file a new bug instead of adding information here.
> What you're seeing is most likely a totally different issue.
>
> FWIW, I've been running NM in wifi only with IPv6 set to Automatic for
> the past few days with no issues at all; and previously for a few months
> with both wired and wifi with IPv6 enabled and "Automatic", with no
> issues either. I'll set this back to Invalid because IPv6 does not
> appear to cause an issue with wireless itself and because this bug was
> filed a long time ago, when NM didn't even really support IPv6 so much.
>
> If you're still seeing issues, please don't hesitate to file a new,
> separate bug so that it can be looked into. The easiest way to do this
> is with the command:  "ubuntu-bug network-manager"
>
> ** Changed in: network-manager (Ubuntu)
>       Status: New => Invalid
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/158481
>
> Title:
>  IPv6 causes wireless to disconnect/reconnect often
>
> Status in “network-manager” package in Ubuntu:
>  Invalid
>
> Bug description:
>  Binary package hint: network-manager
>
>  I have had the following bug since Ubuntu 6.10:
>
>  - I connect to a wireless network with Network Manager (doesn't matter
> whether it's hidden or has any type of encryption)
>  - After a few minutes my connection goes down (usually around 10-30
> minutes)
>  - I can immediately see nm-applet trying to reconnect or connect to
> another network
>
>  My computer is a Thinkpad T60 with an Atheros-based internal wireless
>  interface (more specifically, AR5212 802.11abg NIC) using the default
>  MadWifi drivers that are shipped with Ubuntu.
>
>  This is a big problem when doing long downloads, or using SSH or VNC.
>  At times, nm-applet would even fail to reconnect to any of the
>  available networks, requiring me to restart the NetworkManager process
>  by hand.
>
>  This does not happen on the same machine when running Windows, so
>  malfunctioning hardware and anything external to the computer are
>  obviously not the underlying cause. Other (Windows) computers on the
>  same wireless networks operate without any problems.
>
>  Also, the problem survived through clean installs of Ubuntu 7.04 and,
>  later, 7.10. So this is not an issue related to my specific settings.
>
>  After a while looking for a solution for almost 1 year, I finally
>  found a temporary fix: to disable IPv6. I'm not sure *why* this works,
>  but the fact is that it *does*. I've been happily using my WiFi now
>  for 20 days without a single reconnect. This is how I disabled it:
>
>  - edit /etc/modprobe.d/aliases
>  - change line "alias net-pf-10 ipv6" to "alias net-pf-10 off ipv6"
>  - reboot
>
>  I explained these steps on another bug report
>  (https://bugs.launchpad.net/ubuntu/+source/network-
>  manager/+bug/64173), but since I'm not sure whether the original
>  poster's bug was related to mine, I figured it would be better to open
>  a brand new one.
>
> To unsubscribe from this bug, go to:
>
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/158481/+subscribe
>



-- 
Best regards,
Simon