Wireless suddenly disconnecting

[.dave]

I'm getting issues as well.

This seems to be a big problem for people at the moment. It's a real shame as I normally rate Ubuntu highly for people looking for a ******* alternative. But I can't recommend it to the 'infirm' if they are going to have constant battles to get their internet working.

Hope to see a fix soon.

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Has anyone tried this solution with any success? http://edtake.wordpress.com/2010/05/...keep-dropping/

ubuntu] Lucid Lynx Wireless Keep Dropping (updated)

10 05 2010 After enduring the endless wireless disconnection after upgrading to Ubuntu 10.04 (Lucid Lynx) I have finally found the solution!
The symptoms I was seeing is as such:

1. connected
2. after using for 5 minutes to 10 minutes, the wireless network manager get disconnected
3. only wireless connection selectable is the last network you connect to
4. unable to re-connect, even after 10 minutes
5. you must disable the wireless and enable it before you can try to reconnect…
6. then back to step 1

The steps below worked for me

• sudo gedit /etc/NetworkManager/nm-system-settings.conf
• set the “[ifupdown] managed=false” to true.

Although the above changes reduced the frequency of the wireless drop, but I am still facing it. After thinking it around a bit more, it’s more stable now. Below are what I have done:

• sudo gedit /etc/NetworkManager/nm-system-settings.conf

• Changed the file to:

[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=true
[ifdown]
managed=true
[ifup]
managed=true

Good luck to you! And have fun with Lucid Lynx. Let me know if this works or if there are other better fix!
Added on June 28, 2010:
With with the fixes above, it has only lessen the problem on my machine and not totally eliminate it. Thanks for the comments on trying out wicd, which i did give it a try. BUT although the wireless connection didn’t drop at all for the 2 days which i have been using it, i see a cap on the wireless transmission rate of 60KB/s (even after trying “sudo iwconfig wlan0 rate 54M”, which is not the problem). This is not acceptable to me, which is why i sent back to using gnome network manager, but for those of you who want to try out wicd, below are the commands:

sudo apt-get install wicd
sudo apt-get remove network-manager

Drop me a message if you have a solution to the transmission rate cap!

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Good luck and hopefully we'll all find a solution eventually.

[moore.bryan]

I've taken to downloading/installing the bleeding-edge compat-wireless, which makes things better for me.

[Dankstar]

Thanks to this thread I tried installing the package linux-backports-modules-compat-wireless-2.6.36-2.6.35-23-generic and so far the disconnection, low speed connection and packet loss nonsense I was having with my ath9k seems to have gone. It's now 54Mbit and hasn't presented a reconnection message or asked for a password in the last 24 hours. Hopefully it'll stay this way. I am using Kubuntu 10.10.