Public bug reported: I installed Ubuntu 15.10 in VMware Workstation 12 Player to give it a try and I noticed that the network disconnects and reconnects every several minutes. I can't see this in other virtual machines or in the host machine (which runs Ubuntu 14.04 LTS). Here is a part of the syslog:
Sep 19 14:04:49 ubuntu NetworkManager[725]: <info> (eno16777736): link disconnected (deferring action for 4 seconds) Sep 19 14:04:49 ubuntu kernel: [ 6157.643978] e1000: eno16777736 NIC Link is Down Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> (eno16777736): link disconnected (calling deferred action) Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40] Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> (eno16777736): canceled DHCP transaction, DHCP client pid 23002 Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> (eno16777736): DHCPv4 state changed bound -> done Sep 19 14:04:53 ubuntu avahi-daemon[721]: Withdrawing address record for 172.16.110.138 on eno16777736. Sep 19 14:04:53 ubuntu avahi-daemon[721]: Leaving mDNS multicast group on interface eno16777736.IPv4 with address 172.16.110.138. Sep 19 14:04:53 ubuntu avahi-daemon[721]: Interface eno16777736.IPv4 no longer relevant for mDNS. Sep 19 14:04:53 ubuntu avahi-daemon[721]: Withdrawing address record for fe80::20c:29ff:fed8:4c0c on eno16777736. Sep 19 14:04:53 ubuntu avahi-daemon[721]: Leaving mDNS multicast group on interface eno16777736.IPv6 with address fe80::20c:29ff:fed8:4c0c. Sep 19 14:04:53 ubuntu avahi-daemon[721]: Interface eno16777736.IPv6 no longer relevant for mDNS. Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> Writing DNS information to /sbin/resolvconf Sep 19 14:04:53 ubuntu whoopsie[693]: [14:04:53] Cannot reach: https://daisy.ubuntu.com Sep 19 14:04:53 ubuntu whoopsie[693]: [14:04:53] Cannot reach: https://daisy.ubuntu.com Sep 19 14:04:53 ubuntu dnsmasq[829]: setting upstream servers from DBus Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> NetworkManager state is now CONNECTED_LOCAL Sep 19 14:04:53 ubuntu NetworkManager[725]: <info> NetworkManager state is now DISCONNECTED Sep 19 14:04:53 ubuntu dbus[611]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' Sep 19 14:04:53 ubuntu systemd[1]: Starting Network Manager Script Dispatcher Service... Sep 19 14:04:53 ubuntu dbus[611]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Sep 19 14:04:53 ubuntu systemd[1]: Started Network Manager Script Dispatcher Service. Sep 19 14:04:53 ubuntu nm-dispatcher: Dispatching action 'down' for eno16777736 Sep 19 14:04:54 ubuntu gnome-session[2339]: (deja-dup-monitor:2783): GLib-CRITICAL **: Source ID 211 was not found when attempting to remove it Sep 19 14:04:54 ubuntu org.freedesktop.Notifications[2212]: ** Message: resizing pixbuf to 44 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): link connected Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40] Sep 19 14:04:55 ubuntu kernel: [ 6163.654550] e1000: eno16777736 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> Device 'eno16777736' has no connection; scheduling activate_check in 0 seconds. Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> Auto-activating connection 'Wired connection 1'. Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): Activation: starting connection 'Wired connection 1' (63e6e203-d873-4bdb-b106-bc9cf709d023) Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: disconnected -> prepare (reason 'none') [30 40 0] Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> NetworkManager state is now CONNECTING Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: prepare -> config (reason 'none') [40 50 0] Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: config -> ip-config (reason 'none') [50 70 0] Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> Activation (eno16777736) Beginning DHCPv4 transaction (timeout in 45 seconds) Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> dhclient started with pid 23200 Sep 19 14:04:55 ubuntu dhclient: DHCPREQUEST of 172.16.110.138 on eno16777736 to 255.255.255.255 port 67 (xid=0x162927e3) Sep 19 14:04:55 ubuntu dhclient: DHCPACK of 172.16.110.138 from 172.16.110.254 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> address 172.16.110.138 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> plen 24 (255.255.255.0) Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> gateway 172.16.110.2 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> server identifier 172.16.110.254 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> lease time 1800 Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> nameserver '172.16.110.2' Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> domain name 'localdomain' Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> wins '172.16.110.2' Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): DHCPv4 state changed unknown -> bound Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: ip-config -> ip-check (reason 'none') [70 80 0] Sep 19 14:04:55 ubuntu avahi-daemon[721]: Joining mDNS multicast group on interface eno16777736.IPv4 with address 172.16.110.138. Sep 19 14:04:55 ubuntu avahi-daemon[721]: New relevant interface eno16777736.IPv4 for mDNS. Sep 19 14:04:55 ubuntu avahi-daemon[721]: Registering new address record for 172.16.110.138 on eno16777736.IPv4. Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: ip-check -> secondaries (reason 'none') [80 90 0] Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): device state change: secondaries -> activated (reason 'none') [90 100 0] Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> NetworkManager state is now CONNECTED_LOCAL Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] Cannot reach: https://daisy.ubuntu.com Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] Cannot reach: https://daisy.ubuntu.com Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> NetworkManager state is now CONNECTED_GLOBAL Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> Policy set 'Wired connection 1' (eno16777736) as default for IPv4 routing and DNS. Sep 19 14:04:55 ubuntu dnsmasq[829]: setting upstream servers from DBus Sep 19 14:04:55 ubuntu dnsmasq[829]: using nameserver 172.16.110.2#53 Sep 19 14:04:55 ubuntu dhclient: bound to 172.16.110.138 -- renewal in 842 seconds. Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> Writing DNS information to /sbin/resolvconf Sep 19 14:04:55 ubuntu NetworkManager[725]: <info> (eno16777736): Activation: successful, device activated. Sep 19 14:04:55 ubuntu nm-dispatcher: Dispatching action 'up' for eno16777736 Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/5 Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/5 Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/5 Sep 19 14:04:55 ubuntu org.freedesktop.Notifications[2212]: ** Message: resizing pixbuf to 44 Sep 19 14:04:55 ubuntu gnome-session[2339]: (deja-dup-monitor:2783): GLib-CRITICAL **: Source ID 211 was not found when attempting to remove it Sep 19 14:04:55 ubuntu whoopsie[693]: [14:04:55] online Sep 19 14:04:56 ubuntu avahi-daemon[721]: Joining mDNS multicast group on interface eno16777736.IPv6 with address fe80::20c:29ff:fed8:4c0c. Sep 19 14:04:56 ubuntu avahi-daemon[721]: New relevant interface eno16777736.IPv6 for mDNS. Sep 19 14:04:56 ubuntu avahi-daemon[721]: Registering new address record for fe80::20c:29ff:fed8:4c0c on eno16777736.*. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: network-manager 1.0.4-0ubuntu3 ProcVersionSignature: Ubuntu 4.2.0-10.12-generic 4.2.0 Uname: Linux 4.2.0-10-generic x86_64 ApportVersion: 2.18.1-0ubuntu1 Architecture: amd64 CurrentDesktop: Unity Date: Sat Sep 19 14:08:34 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2015-09-19 (0 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150919) IpRoute: default via 172.16.110.2 dev eno16777736 proto static metric 100 169.254.0.0/16 dev eno16777736 scope link metric 1000 172.16.110.0/24 dev eno16777736 proto kernel scope link src 172.16.110.138 metric 100 IwConfig: eno16777736 no wireless extensions. lo no wireless extensions. NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true RfKill: SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH Wired connection 1 63e6e203-d873-4bdb-b106-bc9cf709d023 802-3-ethernet 1442696839 Sat 19 Sep 2015 02:07:19 PM PDT yes 0 no /org/freedesktop/NetworkManager/Settings/0 yes eno16777736 activated /org/freedesktop/NetworkManager/ActiveConnection/5 nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH eno16777736 ethernet connected /org/freedesktop/NetworkManager/Devices/1 Wired connection 1 63e6e203-d873-4bdb-b106-bc9cf709d023 /org/freedesktop/NetworkManager/ActiveConnection/5 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- -- nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. ** Affects: network-manager (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1497636 Title: Network disconnects sporadically To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1497636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
