Im using Ubuntu Oneiric and AR9285 Wireless Network Adapter.

I can connect to my wireless network without problem. However when I click the "Network Connection" icon on system tray, it is disabled and it says "Wireless Network device not managed".

When I checked it on terminal using "iwconfig wlan0", it seems ok.

wlan0 IEEE 802.11bgn  ESSID:"dd-wrt"  
Mode:Managed  Frequency:2.462 GHz  Access Point: 00:22:6B:58:E6:D0   
Bit Rate=54 Mb/s   Tx-Power=15 dBm   
Retry  long limit:7   RTS thr:off   Fragment thr:off
Power Management:off
Link Quality=69/70  Signal level=-41 dBm  
Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
Tx excessive retries:0  Invalid misc:445   Missed beacon:0

How do I fix this?


I was able to fix this by editing NetworkManager configuration file.

Edit /etc/NetworkManager/NetworkManager.conf and it should look like this:



credit goes to http://ubuntuforums.org/showthread.php?p=9402242

However, when I reboot my machine, on startup screen it shows "Waiting for network connection" for a few seconds (which will take more time to boot). The only workaround for now is to replace lightdm with gdm.


What worked for me was to remove the lines associated with the wireless interface from /etc/network/interfaces, and then reboot:

sudo sensible-editor /etc/network/interfaces

If you aren't sure which interface that is, try


and look for the lines with ESSID, indicating that they are a wireless interface.


I was able to fix this by installing 'dhcpcd'

$ apt-get install dhcpcd

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