I am facing the same problem with 2 wired connections. No matter what I do, if I connect with 1st ethernet or switch to 2nd wired, the problem persists. After boot up, when the problem starts, I switch the cable of ethernet and temporally the problem finishes.
$ sudo lshw -C network [sudo] password for rodrigo: *-network description: Ethernet interface product: I211 Gigabit Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: enp4s0 version: 03 serial: 1c:1b:0d:63:ab:3b size: 1Gbit/s capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.4.0-k duplex=full firmware=0. 6-1 ip=192.168.0.106 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s resources: irq:16 memory:dfd00000-dfd1ffff ioport:d000(size=32) memory:dfd20000-dfd23fff *-network DISABLED description: Wireless interface product: Wireless 8260 vendor: Intel Corporation physical id: 0 bus info: pci@0000:05:00.0 logical name: wlp5s0 version: 3a serial: e4:a4:71:62:32:bb width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-45-generic firmware=34.0.1 latency=0 link=no multicast=yes wireless=IEEE 802.11 resources: irq:131 memory:dfc00000-dfc01fff *-network description: Ethernet interface product: Ethernet Connection (2) I219-V vendor: Intel Corporation physical id: 1f.6 bus info: pci@0000:00:1f.6 logical name: enp0s31f6 version: 31 serial: 1c:1b:0d:63:ab:39 capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.8-4 latency=0 link=no multicast=yes port=twisted pair resources: irq:123 memory:dff00000-dff1ffff Here my syslog with the steps: after started the system, connection fine; when I started web navigation, the connection failed; I turned off and turned on the wired connection using Wired Settings (GUI); connection fine again; connection failed again in few seconds; I turned off and turned on the wired connection using Wired Settings (GUI) again; connection fine again; connection failed again in few seconds; I turned off wired connection, and turned on the wi-fi connection; wi-fi working fine during some minutes; I turned off wi-fi and turned on wired again; wired connection working fine till now. Here the syslog: $ cat /var/log/syslog | grep NetworkManager Feb 1 07:12:08 guari NetworkManager[928]: <info> [1549012328.4405] manager: NetworkManager state is now CONNECTED_GLOBAL Feb 1 07:12:08 guari dbus-daemon[898]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.12' (uid=0 pid=928 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined") Feb 1 07:12:08 guari whoopsie[1440]: [07:12:08] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/2 Feb 1 07:12:08 guari whoopsie[1440]: [07:12:08] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/2 Feb 1 07:12:08 guari whoopsie[1440]: [07:12:08] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/2 Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3226] manager: rfkill: WiFi hardware radio set disabled Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3227] device (wlp5s0): state change: activated -> unavailable (reason 'none', sys-iface-state: 'managed') Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3584] dhcp4 (wlp5s0): canceled DHCP transaction, DHCP client pid 8049 Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3584] dhcp4 (wlp5s0): state changed bound -> done Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3607] manager: NetworkManager state is now CONNECTED_SITE Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3637] manager: NetworkManager state is now CONNECTED_LOCAL Feb 1 07:54:49 guari dbus-daemon[898]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.12' (uid=0 pid=928 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined") Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3645] manager: NetworkManager state is now DISCONNECTED Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3732] audit: op="radio-control" arg="wireless-enabled:0" pid=12405 uid=1000 result="success" Feb 1 07:54:49 guari NetworkManager[928]: <info> [1549014889.3739] manager: rfkill: WiFi now disabled by radio killswitch Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1239] device (enp4s0): Activation: starting connection 'Wired connection 2' (2924aa78-ea0a-34cb-96cc-abf787ff7b93) Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1243] audit: op="connection-activate" uuid="2924aa78-ea0a-34cb-96cc-abf787ff7b93" name="Wired connection 2" pid=12405 uid=1000 result="success" Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1266] device (enp4s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1282] manager: NetworkManager state is now CONNECTING Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1303] device (enp4s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1334] device (enp4s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1365] dhcp4 (enp4s0): activation: beginning transaction (timeout in 45 seconds) Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1416] dhcp4 (enp4s0): dhclient started with pid 12471 Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1831] dhcp4 (enp4s0): address 192.168.0.106 Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1831] dhcp4 (enp4s0): plen 24 (255.255.255.0) Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1831] dhcp4 (enp4s0): gateway 192.168.0.1 Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1831] dhcp4 (enp4s0): lease time 172800 Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1832] dhcp4 (enp4s0): nameserver '200.204.0.10' Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1832] dhcp4 (enp4s0): nameserver '200.204.0.138' Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1832] dhcp4 (enp4s0): state changed unknown -> bound Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1845] device (enp4s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1851] device (enp4s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1853] device (enp4s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed') Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1854] manager: NetworkManager state is now CONNECTED_LOCAL Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1881] manager: NetworkManager state is now CONNECTED_SITE Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1881] policy: set 'Wired connection 2' (enp4s0) as default for IPv4 routing and DNS Feb 1 07:55:20 guari NetworkManager[928]: <info> [1549014920.1884] device (enp4s0): Activation: successful, device activated. Feb 1 07:55:20 guari dbus-daemon[898]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.12' (uid=0 pid=928 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined") Feb 1 07:57:08 guari NetworkManager[928]: <info> [1549015028.3651] manager: NetworkManager state is now CONNECTED_GLOBAL Feb 1 07:57:08 guari dbus-daemon[898]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.12' (uid=0 pid=928 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined") Feb 1 07:57:08 guari whoopsie[1440]: [07:57:08] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/3 Feb 1 07:57:08 guari whoopsie[1440]: [07:57:08] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/3 Feb 1 07:57:08 guari whoopsie[1440]: [07:57:08] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/3 Thanks. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1666432 Title: Internet drops every few minutes on wired and wireless connection Status in network-manager package in Ubuntu: Confirmed Bug description: Internet drops every 1-30 minutes when connected via wired or wireless (i.e., this is a problem on both wired and wireless) even though connection icon indicates the computer is still connected. Disconnecting and reconnecting via the connection icon resets internet temporarily until the next time. Dropped internet is discovered with "The site can't be reached" screens in Chromium, or error messages when downloading/updating in Terminal, or missing connection in Ubuntu Software app, or stalled syncing in Insync application (occurred even without Insync). Internet drops more frequently on wireless than on wired. It seems to disconnect more frequently with heavier internet use (e.g., downloading multiple files, opening several webpages in quick succession). This is a fresh install (yesterday) of Ubuntu 16.04 on a Dell Inspiron 15 5567 (dual boot). It occurs when running Live CD as well though. Ethernet and wifi both work without randomly disconnecting in Windows 10 on the same machine, and ethernet and wifi work on other machines running Ubuntu and Windows with the same router, so it is not a hardware or router issue. Output from sudo lshw -class network *-network description: Wireless interface product: Wireless 3165 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlp2s0 version: 79 serial: 58:fb:84:55:21:52 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-62-generic firmware=17.352738.0 ip=192.168.1.15 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn resources: irq:283 memory:df100000-df101fff *-network description: Ethernet interface product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: enp3s0 version: 07 serial: 18:db:f2:3c:d5:37 size: 10Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:279 ioport:d000(size=256) memory:df000000-df000fff memory:d0300000-d0303fff ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: network-manager 1.2.2-0ubuntu0.16.04.3 ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40 Uname: Linux 4.4.0-62-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: Unity Date: Tue Feb 21 16:36:55 2017 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2017-02-20 (1 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) IpRoute: default via 192.168.1.1 dev wlp2s0 proto static metric 600 169.254.0.0/16 dev wlp2s0 scope link metric 1000 192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.15 metric 600 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH wlp2s0 wifi connected /org/freedesktop/NetworkManager/Devices/0 pr500k-9912ec-1 36301ded-0ac5-4a86-9621-87290ef159af /org/freedesktop/NetworkManager/ActiveConnection/5 enp3s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 -- -- -- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/2 -- -- -- nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.2.2 connected started full enabled enabled enabled enabled enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1666432/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp