[Desktop-packages] [Bug 1666318] Re: Disconnecting and reconnecting docking station breaks DNS
*** This bug is a duplicate of bug 1676810 *** https://bugs.launchpad.net/bugs/1676810 ** This bug has been marked a duplicate of bug 1676810 Network Manager needs restarting from sleep -- 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/1666318 Title: Disconnecting and reconnecting docking station breaks DNS Status in network-manager package in Ubuntu: New Bug description: I'm not sure which package this bug should be submitted to as service troubleshooting in the latest few Ubuntu releases is a jumbled mess. Anyway, here's how to repro the problem: - Lenovo Carbon X1 2016 (4th gen), OneLink+ docking station - Ethernet connected to docking station - Disconnect docking station - Reconnect docking station From this point on all DNS requests fail. Workarounds I found so far: - reboot the machine (not really a solution) - sudo system network-manager restart (requires sudo access) - usually in older releases I'd just poke around with the resolver config files, but anything I do seems to be ignored now so I gave up and posted a bug instead. Here's the journalctl log for NetworkManager, followed by an example of the problem: nico@nico-lenovo-ubuntu:~$ journalctl -u NetworkManager -f -- Logs begin at Sun 2017-02-19 00:10:56 GMT. -- Feb 20 20:22:41 nico-lenovo-ubuntu NetworkManager[6715]: [1487622161.9976] dns-mgr: Writing DNS information to /sbin/resolvconf Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: setting upstream servers from DBus Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via lan1) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via lan1) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via wifi0) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via wifi0) Feb 20 20:22:42 nico-lenovo-ubuntu NetworkManager[6715]: [1487622162.0156] device (wifi0): Activation: successful, device activated. Feb 20 20:22:42 nico-lenovo-ubuntu NetworkManager[6715]: [1487622162.0169] manager: startup complete Feb 20 20:22:43 nico-lenovo-ubuntu NetworkManager[6715]: [1487622163.1408] manager: WiFi hardware radio set enabled Feb 20 20:22:43 nico-lenovo-ubuntu NetworkManager[6715]: [1487622163.1409] manager: WWAN hardware radio set disabled Feb 20 20:27:40 nico-lenovo-ubuntu dhclient[6736]: receive_packet failed on lan1: Network is down Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1588] manager: NetworkManager state is now CONNECTED_LOCAL Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1589] manager: NetworkManager state is now CONNECTED_GLOBAL Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1590] policy: set 'Auto ITADINANTA' (wifi0) as default for IPv4 routing and DNS Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1590] device (lan1): state change: activated -> unmanaged (reason 'removed') [100 10 36] Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1594] dhcp4 (lan1): canceled DHCP transaction, DHCP client pid 6736 Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1595] dhcp4 (lan1): state changed bound -> done Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1618] dns-mgr: Writing DNS information to /sbin/resolvconf Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: setting upstream servers from DBus Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via wifi0) Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via wifi0) Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1799] platform-linux: do-change-link[5]: failure changing link: failure 19 (No such device) Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1800] device (lan1): failed to disable userspace IPv6LL address handling Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1803] devices removed (path: /sys/devices/pci:00/:00:14.0/usb2/2-4/2-4.1/2-4.1.3/2-4.1.3:2.0/net/lan1, iface: lan1) Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.6972] device (eth0): failed to find device 6 'eth0' with udev Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.6990] manager: (eth0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/4) Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.7679] device (eth0): interface index 6 renamed iface from 'eth0' to 'lan1' Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.7742] devices added (path:
[Desktop-packages] [Bug 1666318] Re: Disconnecting and reconnecting docking station breaks DNS
If it helps, commenting out/removing # dns=dnsmasq from /etc/NetworkManager/NetworkManager.conf makes the problem go away. -- 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/1666318 Title: Disconnecting and reconnecting docking station breaks DNS Status in network-manager package in Ubuntu: New Bug description: I'm not sure which package this bug should be submitted to as service troubleshooting in the latest few Ubuntu releases is a jumbled mess. Anyway, here's how to repro the problem: - Lenovo Carbon X1 2016 (4th gen), OneLink+ docking station - Ethernet connected to docking station - Disconnect docking station - Reconnect docking station From this point on all DNS requests fail. Workarounds I found so far: - reboot the machine (not really a solution) - sudo system network-manager restart (requires sudo access) - usually in older releases I'd just poke around with the resolver config files, but anything I do seems to be ignored now so I gave up and posted a bug instead. Here's the journalctl log for NetworkManager, followed by an example of the problem: nico@nico-lenovo-ubuntu:~$ journalctl -u NetworkManager -f -- Logs begin at Sun 2017-02-19 00:10:56 GMT. -- Feb 20 20:22:41 nico-lenovo-ubuntu NetworkManager[6715]: [1487622161.9976] dns-mgr: Writing DNS information to /sbin/resolvconf Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: setting upstream servers from DBus Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via lan1) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via lan1) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via wifi0) Feb 20 20:22:42 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via wifi0) Feb 20 20:22:42 nico-lenovo-ubuntu NetworkManager[6715]: [1487622162.0156] device (wifi0): Activation: successful, device activated. Feb 20 20:22:42 nico-lenovo-ubuntu NetworkManager[6715]: [1487622162.0169] manager: startup complete Feb 20 20:22:43 nico-lenovo-ubuntu NetworkManager[6715]: [1487622163.1408] manager: WiFi hardware radio set enabled Feb 20 20:22:43 nico-lenovo-ubuntu NetworkManager[6715]: [1487622163.1409] manager: WWAN hardware radio set disabled Feb 20 20:27:40 nico-lenovo-ubuntu dhclient[6736]: receive_packet failed on lan1: Network is down Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1588] manager: NetworkManager state is now CONNECTED_LOCAL Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1589] manager: NetworkManager state is now CONNECTED_GLOBAL Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1590] policy: set 'Auto ITADINANTA' (wifi0) as default for IPv4 routing and DNS Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1590] device (lan1): state change: activated -> unmanaged (reason 'removed') [100 10 36] Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1594] dhcp4 (lan1): canceled DHCP transaction, DHCP client pid 6736 Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1595] dhcp4 (lan1): state changed bound -> done Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1618] dns-mgr: Writing DNS information to /sbin/resolvconf Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: setting upstream servers from DBus Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.4.100#53(via wifi0) Feb 20 20:27:40 nico-lenovo-ubuntu dnsmasq[6728]: using nameserver 194.168.8.100#53(via wifi0) Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1799] platform-linux: do-change-link[5]: failure changing link: failure 19 (No such device) Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1800] device (lan1): failed to disable userspace IPv6LL address handling Feb 20 20:27:40 nico-lenovo-ubuntu NetworkManager[6715]: [1487622460.1803] devices removed (path: /sys/devices/pci:00/:00:14.0/usb2/2-4/2-4.1/2-4.1.3/2-4.1.3:2.0/net/lan1, iface: lan1) Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.6972] device (eth0): failed to find device 6 'eth0' with udev Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.6990] manager: (eth0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/4) Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.7679] device (eth0): interface index 6 renamed iface from 'eth0' to 'lan1' Feb 20 20:27:56 nico-lenovo-ubuntu NetworkManager[6715]: [1487622476.7742] devices added (path: /sys/devices/pci:00/:00:14.0/usb2/2-4/2-4.1/2-4.1.3/2-4.1.3:2.0/net/lan1, iface: lan1) Feb 20 20:27:56
