Ubuntu 9.04 “Wired Network – device not managed”
by Craig Mayhew on Jun.13, 2009, under Guides/Fixes, Linux/Ubuntu
After upgrading to Ubuntu 9.04 I’ve found the network manager GUI to be far superior to the previous version I was using in Ubuntu 8.04 LTS. Unfortunately when I was using Ubuntu 8.04 I made some custom alterations to my network setup in the “/etc/network/interfaces” file. The Network Manager in 9.04 wasn’t keen on this and so refused to manage it, instead it displayed the message “Wired Network – device not managed”.
As a work around I commented out all of my changes by placing a # at the beginning of each line in my interfaces file:
Open the interfaces file in an editor:
sudo vim /etc/network/interfaces
This is an example of how my file looked before I modified it. Yours will be different:
auto lo iface lo inet loopback iface eth2 inet static address 192.168.0.44 netmask 255.255.255.0 gateway 192.168.0.1 auto eth2
And here’s the same file again, but I’ve added #’s at the beginning of each line so that they are ignored:
#auto lo #iface lo inet loopback #iface eth2 inet static #address 192.168.0.44 #netmask 255.255.255.0 #gateway 192.168.0.1 #auto eth2
In order for the changes to take effect, we need to restart the network manager and the applet by running each of these in the command line:
sudo /etc/init.d/networking restart
And now restart the network manager applet:
pkill nm-applet nm-applet
You should now be able to manage the network connection from within the network manager applet.
10 Comments for this entry
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Karmic Koala | Chris Hanretty
November 10th, 2009 on 2:31 pm[...] worked perfectly, my ethernet didn’t autoconnect. I fixed it by following the steps at Craig Mayhew’s blog, but that shouldn’t be necessary: this was a fresh install after [...]
June 29th, 2009 on 3:23 pm
Thank you.It’s very useful.
July 5th, 2009 on 1:19 pm
I have same message “Wired Network – device not managed”, and I can’t manage the network connections.
I’ll try something else.
July 11th, 2009 on 7:22 pm
Yes, this also did not work for me. This isn’t really much of a fix, anyway.
July 12th, 2009 on 12:30 am
Hi Snake, Bondo,
Try changing [ifupdown] managed=false to true in /etc/NetworkManager/nm-system-settings.conf
July 13th, 2009 on 6:11 am
Hey!
Thanks for sharing the info… I had this problem and solved it…
cheers!
July 16th, 2009 on 4:11 am
This worked for me. I wonder if I go back now and uncomment if it will still work.
Note to self:::don’t try wicd because of Network Manager problems and then try to switch back when wicd sucks.
September 27th, 2009 on 10:02 am
It worked for me. But had to restart my pc for the settings to take effect. Restarting the network service didn’t do the job. Thanks buddy..
January 4th, 2010 on 3:25 pm
Thank you! This solution worked for me to (8.04LTS –> 9.04)! Found this post on google, I love finding troubleshooters in old blog posts..
January 4th, 2010 on 6:03 pm
Had the same problem but solved it by changing [ifupdown] managed=false to true in /etc/NetworkManager/nm-system-settings.conf
February 1st, 2010 on 2:39 am
Thank you. It works!
I have been bothered by the question for a long time. After reading your article, I was eagle to try it. It really works on my Ubuntu 9.10. Thanks again!