[ubuntu] Lucid Lynx Wireless Keep Dropping (updated)

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!