I see this too. Looking at the logs on my machine I see that the message is printed once or twice per day.
** Changed in: network-manager (Ubuntu) Status: New => Confirmed ** Summary changed: - Unknown username "dnsmasq" in message bus configuration file + Message in /var/log/upstart/dbus.log: 'Unknown username "dnsmasq" in message bus configuration file' -- 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/1077571 Title: Message in /var/log/upstart/dbus.log: 'Unknown username "dnsmasq" in message bus configuration file' Status in “network-manager” package in Ubuntu: Confirmed Bug description: Get that error logged inside /var/log/upstart/dbus.log ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: network-manager 0.9.6.0-0ubuntu7 ProcVersionSignature: Ubuntu 3.7.0-0.5-generic 3.7.0-rc4 Uname: Linux 3.7.0-0-generic i686 ApportVersion: 2.6.2-0ubuntu3 Architecture: i386 CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Sun Nov 11 08:10:33 2012 IpRoute: default via 192.168.1.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2 metric 1 IwConfig: lo no wireless extensions. eth0 no wireless extensions. eth1 no wireless extensions. MarkForUpload: True NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true RfKill: SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: WpaSupplicantLog: nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH Connexion filaire 2 f023ceed-00a1-404d-ac10-3211d2834dcc 802-3-ethernet 1352614380 dim. 11 nov. 2012 07:13:00 CET yes no /org/freedesktop/NetworkManager/Settings/1 Connexion filaire 1 72df9ef1-ebe6-4b11-8f73-40f25abdf859 802-3-ethernet 1352617679 dim. 11 nov. 2012 08:07:59 CET yes no /org/freedesktop/NetworkManager/Settings/0 nmcli-dev: DEVICE TYPE STATE DBUS-PATH eth1 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 eth0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0 nmcli-nm: RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN running 0.9.6.0 connected enabled enabled enabled enabled disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1077571/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp