It's much more likely that this is due to the update of dnsmasq (https://launchpad.net/ubuntu/+source/dnsmasq/2.73-1):
juin 30 09:51:14 u32 NetworkManager[812]: <warn> dnsmasq not available on the bus, can't update servers. juin 30 09:51:14 u32 NetworkManager[812]: <error> [1435650674.886674] [dns-manager/nm-dns-dnsmasq.c:398] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name juin 30 09:51:14 u32 NetworkManager[812]: <warn> DNS: plugin dnsmasq update failed Can you please test downgrading dnsmasq-base to the previous version https://launchpad.net/ubuntu/+source/dnsmasq/2.72-3.1build1 ? If that works, then it's a dnsmasq regression, or NetworkManager needs to get adjusted to the newer version. If that doesn't work, can you please try to downgrade to the previous systemd version? This is much less likely to work as systemd doesn't do any network configuration beyond starting NetworkManager (which obviously works) and calling ifupdown (which you don't seem to use). ** Package changed: systemd (Ubuntu) => dnsmasq (Ubuntu) ** Changed in: dnsmasq (Ubuntu) Status: New => Incomplete ** Summary changed: - NSEC3: verify failed due to bad signature (keyid=33878): RRSIG validity period has not begun + NetworkManager[792]: <warn> dnsmasq not available on the bus, can't update servers. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1470028 Title: NetworkManager[792]: <warn> dnsmasq not available on the bus, can't update servers. Status in dnsmasq package in Ubuntu: Incomplete Bug description: First reboot after systemd has been upgraded to 221-1ubuntu2 Network fully broken: no time, browsers failing to open urls Lot of 'time syncing' issues ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: systemd 221-1ubuntu2 ProcVersionSignature: Ubuntu 4.0.0-3.5-generic 4.0.5 Uname: Linux 4.0.0-3-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.17.3-0ubuntu4 Architecture: i386 CurrentDesktop: GNOME Date: Tue Jun 30 11:12:46 2015 Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 046d:c50e Logitech, Inc. Cordless Mouse Receiver Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.0.0-3-generic root=UUID=7b1f4a51-558f-468f-85e0-f815d2f791e1 ro SourcePackage: systemd UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/22/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P5W DH Deluxe dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd07/22/2010:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: P5W DH Deluxe dmi.product.version: System Version dmi.sys.vendor: ASUSTEK COMPUTER INC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1470028/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

