For what it's worth, network-manager 0.9.10.0-4ubuntu15.2 seems to fix the problem for me.
`route -n` with *ubuntu15.1 with both WiFi and Ethernet connections: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.17.75.1 0.0.0.0 UG 1024 0 0 eth0 10.17.75.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0 10.17.75.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 And with *ubuntu15.2: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.17.75.1 0.0.0.0 UG 100 0 0 eth0 0.0.0.0 10.17.75.1 0.0.0.0 UG 400 0 0 wlan0 10.17.75.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0 10.17.75.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 And in both cases for me /etc/resolve.conf has always been: nameserver 127.0.1.1 -- 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/1436330 Title: Network Manager doesn't set metric for local networks any more, causing connection issues Status in NetworkManager: Fix Released Status in network-manager package in Ubuntu: Fix Released Status in network-manager source package in Vivid: Fix Committed Bug description: [Impact] NM changed its method of setting routes on systems, and no longer attaches a metric value specific to the type of device being used. These values were used to prioritize connections, so that for example, when connected to both wired and wireless at the same time, wired can be used in priority over wireless without incurring packet loss. Currently, when connected to both wired and wireless are connected to the same subnet, the user may notice connectivity issues since packets are sent in a round-robin fashion over all default routes on the same subnet with the same metric. [Test Case] 1- Connect to a wireless network. 2- Connect to the same network over Ethernet both connections should come up on the same subnet. 3- Make sure there is no packet loss, and that there are specific metric values for each default route, as displayed by 'ip route'. [Regression Potential] Since handling default routes properly involves correcting the behavior for all device types, VPN behavior may change to pick up the default routes in all cases, over a wired connection. It's also possible that a connection pick up the default route when it is not meant to. --- With Vivid, having two connections to the same network subnet is unstable due to missing metrics for local networks. Example: Being connected to 192.168.1.0/24 via both wired and wireless will cause connectivity issues as sent packets hop between the two interfaces. It used to be that this wasn't an issue. I would go between work and home and plug in and my machine would automatically connect to wireless and it would use the lower metric ethernet interface for all communications, while the wlan interface would remain connected but unused. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: network-manager 0.9.10.0-4ubuntu11 ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1 Uname: Linux 3.19.0-9-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.16.2-0ubuntu4 Architecture: amd64 CurrentDesktop: KDE Date: Wed Mar 25 09:17:27 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2015-01-25 (58 days ago) InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) SourcePackage: network-manager UpgradeStatus: Upgraded to vivid on 2015-03-17 (8 days ago) nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1436330/+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
