If you want to try replacing network-manager with wicd (another connection manager), you can try this procedure. Check out this video for more information, and to see the procedure before trying it!
notes for installing wicd in xubuntu 13.10
1. from the software center, install wicd (search for wicd).
2. when the software center asks to add a user to group netdev, select your user with the check box and click Forward.
3. when the software center finishes installing wicd, go ahead and reboot.
4. upon reboot, you'll get asked for your user password (not network password). you should get some error messages about wicd failing to start. this is normal for xubuntu.
5. once your reboot is done, network-manager should still be running your connection.
6. open a terminal and type the following:
sudo rm /var/lib/wicd/resolv.conf.orig
sudo ln -s /run/resolvconf/resolv.conf /var/lib/wicd/resolv.conf.orig
7. Now use network-manager left click menu to disconnect.
8. From the terminal, type the following to stop network-manager from controling your connections:
sudo service network-manager stop
8. from the Internet area of your menu, select WiCD. It should be scanning for networks.
9. You should be able to connect to your network with the client. You may need to put the name of the interface in preferences (little arrow in the upper right of the wicd menu bar). If you are using encryption, you'll get a little notice and a window will open with connection parameters. Type in your network password.
10. Click Connect. If you connect and get an IP address, we can remove network manager.
To remove network-manager
1. Open a terminal and type:
sudo apt-get purge network-manager
say yes when it asks you about removing packages.
2. Reboot. You should now be totally running on wicd to manage your network and you should be connected.
please note: this procedure, while tested in a virtual environment and on two real laptops of different makes and wireless chipsets, is offered free and without warranty. Depening on your own local installation, your mileage may vary.