I just finished upgrading my laptop to Ubuntu 9.10 (Karmic Koala). After the upgrade finished I noticed that for my wireless card the Network Manger applet in gnome claimed “device not managed.” A quick search revealed that this had happened in the past. I had to set managed=true in /etc/NetworkManager/nm-system-settings.conf. Doing this again and restarting the network service didn’t seem to fix the issue. After a few minutes of looking around in /etc/init.d I saw another service (network-manager!) that needed to be restarted. In summary is here is what you need to do.

1. Edit /etc/NetworkManager/nm-system-settings.conf and set managed=true

Specifically change the ‘managed’ under ifupdown…

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[ifupdown]
managed=false

…to true.

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[ifupdown]
managed=true

2. Restart networking and network-manager services.

You can always restart the computer, but where is the fun in that 🙂 To get things to work without restarting, run the following commands.

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sudo /etc/init.d/network-manager restart
sudo /etc/init.d/networking restart

3. Have fun!

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