I encountered this same message when I tried to add (1) an AT&T USB WLAN adapter, and then again (2) when I tried to add a PPTP-VPN profile.
Here's what I figured out though: 1. I use centrifydc to connect this system to Active Directory. 2. I am working from my office at work, and my domain controllers are on my home network, so it could not confirm that I was a member of the Domain Admins group. 3. /etc/group only had the bindings I had added for "root" and "%Domain\ Admins", so it didn't consider my cached AD-UID as a valid Admin user. 4. /etc/sudoers had a binding for "%Domain\ Admins", but since that group is currently unreachable due to being on a remote network that I would need to VPN to in order to auth against, the sudoers mechanism could not confirm that I had the rights to be performing root level functions. Taking all of this into consideration, I managed somehow to sudo up and edit both files to add my ID explicitly. Then, when I retried to add my VPN profile, it worked! This time, rather than prompting me for root's password, I simply received a prompt to set my key-ring password instead, which I did, and was then able to VPN to my home network over the WLAN adapter. Now, I may be on the wrong track here, and I made the explicit entry in /etc/sudoers identicle for my userID as what was already given for "root", but this worked for me to get this problem solved so that I could get on to other things. I hope this helps someone else, or at least makes it a bit more clear for the developers as to what is going on. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/964705 Title: System policy prevents modification of network settings for all users Status in “network-manager” package in Ubuntu: Confirmed Bug description: This seems like a regression? The screen shot is at http://thesii.org/Screenshot.jpg The nearest link I can find is from the forum area at http://ubuntuforums.org/showthread.php?p=11467777 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: network-manager 0.9.3.995+git201203152001.04b2a74-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic x86_64 ApportVersion: 1.95-0ubuntu1 Architecture: amd64 CRDA: Error: [Errno 2] No such file or directory Date: Sun Mar 25 19:36:45 2012 IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120323) NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: LANGUAGE=en_GB:en TERM=xterm LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/964705/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

