I have been affected by this one for a time now on a 18.04 LTS install
on a laptop with both wired and wireless ethernet. Not a fresh install,
but one that had been upgraded from earlier releases.
I have both Wireless and wired ethernet configured. NetworkManager is
taking care of network IP address assignment, which is done dynamically
on both cases through DHCP from the AP/router.
Every now and then, I get both network interfaces with no IP address assigned
whatsoever. It may happen after resuming from suspend (laptop being powered
down from hours to days) or while actively using the laptop. In all cases it
seems NetworkManager service is still running and "dhclient" processes are up
and running for the interfaces. For the latest time this has occured to me:
"""
# service NetworkManager status
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor
preset: enabled)
Active: active (running) since Fri 2018-11-16 21:31:31 CET; 4 days ago
Docs: man:NetworkManager(8)
Main PID: 845 (NetworkManager)
Tasks: 5 (limit: 4915)
CGroup: /system.slice/NetworkManager.service
├─ 845 /usr/sbin/NetworkManager --no-daemon
├─12154 /sbin/dhclient -d -q -sf
/usr/lib/NetworkManager/nm-dhcp-helper -pf /run/dhclient-wlp3s0.pid -lf
/var/lib/NetworkManager/dhclient-cef3df46-08a4-4e76-b0d8-3a2c21cd504e-wlp3s0.lease
-cf /var/lib/NetworkManager/dhclient-wl
└─23839 /sbin/dhclient -d -q -sf
/usr/lib/NetworkManager/nm-dhcp-helper -pf /run/dhclient-enp0s25.pid -lf
/var/lib/NetworkManager/dhclient-7d46e9cc-ee9c-366d-a025-73d355f9d046-enp0s25.lease
-cf /var/lib/NetworkManager/dhclient-
# ps -efa | grep Netwo
root 845 1 0 nov16 ? 00:00:20 /usr/sbin/NetworkManager
--no-daemon
root 1207 2521 0 14:13 pts/1 00:00:00 grep --color=auto Netwo
root 12154 845 0 nov20 ? 00:00:00 /sbin/dhclient -d -q -sf
/usr/lib/NetworkManager/nm-dhcp-helper -pf /run/dhclient-wlp3s0.pid -lf
/var/lib/NetworkManager/dhclient-cef3df46-08a4-4e76-b0d8-3a2c21cd504e-wlp3s0.lease
-cf /var/lib/NetworkManager/dhclient-wlp3s0.conf wlp3s0
root 23839 845 0 nov20 ? 00:00:00 /sbin/dhclient -d -q -sf
/usr/lib/NetworkManager/nm-dhcp-helper -pf /run/dhclient-enp0s25.pid -lf
/var/lib/NetworkManager/dhclient-7d46e9cc-ee9c-366d-a025-73d355f9d046-enp0s25.lease
-cf /var/lib/NetworkManager/dhclient-enp0s25.conf enp0s25
"""
For me, getting IP addresses assigned again to interfaces is as easy as
running "service NetworkManager restart".
Last significant logs in /var/log/syslog prior to losing connectivity (IP
address) on both network interfaces (wired "enp0s25" and wireless "wlp3s0") are
as below:
"""
#### Wireless interface goes "timed out"
Nov 21 12:13:40 laptop NetworkManager[845]: <info> [1542798820.8236]
connectivity: (wlp3s0) timed out
Nov 21 12:13:40 laptop avahi-daemon[841]: Withdrawing address record for
192.168.1.17 on wlp3s0.
Nov 21 12:13:40 laptop avahi-daemon[841]: Leaving mDNS multicast group on
interface wlp3s0.IPv4 with address 192.168.1.17.
Nov 21 12:13:40 laptop avahi-daemon[841]: Interface wlp3s0.IPv4 no longer
relevant for mDNS.
#### And exactly 20 minutes later so does the wired interface...
Nov 21 12:33:40 laptop NetworkManager[845]: <info> [1542800020.8236]
connectivity: (enp0s25) timed out
Nov 21 12:33:40 laptop NetworkManager[845]: <info> [1542800020.8237] manager:
NetworkManager state is now CONNECTED_SITE
Nov 21 12:33:40 laptop avahi-daemon[841]: Withdrawing address record for
192.168.1.19 on enp0s25.
Nov 21 12:33:40 laptop systemd[1]: Starting Network Manager Script Dispatcher
Service...
Nov 21 12:33:40 laptop avahi-daemon[841]: Leaving mDNS multicast group on
interface enp0s25.IPv4 with address 192.168.1.19.
Nov 21 12:33:40 laptop gsd-sharing[1976]: Failed to StopUnit service:
GDBus.Error:org.freedesktop.systemd1.NoSuchUnit: Unit
gnome-user-share-webdav.service not loaded.
Nov 21 12:33:40 laptop avahi-daemon[841]: Interface enp0s25.IPv4 no longer
relevant for mDNS.
Nov 21 12:33:40 laptop gsd-sharing[1976]: Failed to StopUnit service:
GDBus.Error:org.freedesktop.systemd1.NoSuchUnit: Unit rygel.service not loaded.
Nov 21 12:33:40 laptop dbus-daemon[812]: [system] Activating via systemd:
service name='org.freedesktop.nm_dispatcher'
unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.9' (uid=0
pid=845 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined")
Nov 21 12:33:40 laptop gsd-sharing[1976]: Failed to StopUnit service:
GDBus.Error:org.freedesktop.systemd1.NoSuchUnit: Unit
gnome-remote-desktop.service not loaded.
Nov 21 12:33:40 laptop dbus-daemon[812]: [system] Successfully activated
service 'org.freedesktop.nm_dispatcher'
Nov 21 12:33:40 laptop systemd[1]: Started Network Manager Script Dispatcher
Service.
Nov 21 12:33:40 laptop nm-dispatcher: req:1 'connectivity-change': new request
(1 scripts)
Nov 21 12:33:40 laptop nm-dispatcher: req:1 'connectivity-change': start
running ordered scripts...
Nov 21 12:33:40 laptop nm-dispatcher: req:2 'connectivity-change': new request
(1 scripts)
Nov 21 12:33:40 laptop nm-dispatcher: req:2 'connectivity-change': start
running ordered scripts...
Nov 21 12:34:00 laptop whoopsie[1357]: [12:34:00] Cannot reach:
https://daisy.ubuntu.com
Nov 21 12:34:00 laptop whoopsie[1357]: [12:34:00] offline
"""
It can't be a coincidence both network devices lose the IP addresses due
to some "timed out" event exactly 20 minutes apart. As the event comes
from NetworkManager, so must be the bug causing the observed behavior.
Please check if possible to strengthen NetworkManager in the current and
upcoming releases. Mine being now:
"""
# cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.1 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.1 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/";
SUPPORT_URL="https://help.ubuntu.com/";
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
"""
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1771749
Title:
Ethernet connection lost after few minutes since starting
Status in linux package in Ubuntu:
Confirmed
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
This is the same bug I notified at Bug #1770848 but with a more precise
selection of (what I think it is) the package affected and a better description.
I made a few days ago a fresh install of the Kubuntu 18.04 LTS and it
is most everything Ok, but -I think that- the network-manager has a
problem.
In the last LTS version, Kubuntu 16.04, nor in any Linux version if I
remember well, I never lost connection through Ethernet (the only
Internet connection with our desktop PC), but the Bionic Beaver loses
the connection every now and then, perhaps within few minutes or
hours, but several times per day.
When the connection is lost, I note that it disappears any info even
mention to any network into the network window and the network manager
icon becomes red color.
Not matter if I unplug and then plug the ethernet cable again, the
ethernet connection is not longer detected and only restarting the PC
makes the connection to work again.
Incidentally, I also have noticed with this version of Kubuntu 18.04
that in my laptop there is also now a similar problem with the
scanner: If I plug it in some USB port of the laptop once Kubuntu
18.04 is already running, it's not detected by Xsane. I have to plug
it in before than pressing the power button or at the time of starting
the OS, for the scanner to be detected by the scanning program (and
then only works with Xsane, not if I use Simple Scan or Skanlite, even
when it works under Xsane), as I said in the Bug #1771525 and, evenly,
if I unplug the scanner cable from the USB port it is not detected
anymore when plugging it again, and only restarting the laptop makes
it to be detected.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: network-manager 1.10.6-2ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Thu May 17 08:24:23 2018
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2018-05-11 (5 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64
(20180426)
IpRoute:
default via 192.168.1.1 dev enp0s7 proto static metric 100
169.254.0.0/16 dev enp0s7 scope link metric 1000
192.168.1.0/24 dev enp0s7 proto kernel scope link src 192.168.1.3 metric 100
IwConfig:
enp0s7 no wireless extensions.
lo no wireless extensions.
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
PciNetwork:
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 SLAVE
Conexión cableada 1 1cc37db8-0db8-3887-acf2-59fbbcd0cb1c ethernet
1526538083 jue 17 may 2018 08:21:23 CEST yes 4294967196
no /org/freedesktop/NetworkManager/Settings/1 yes enp0s7 activated
/org/freedesktop/NetworkManager/ActiveConnection/1 --
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
enp0s7 ethernet connected /org/freedesktop/NetworkManager/Devices/2
Conexión cableada 1 1cc37db8-0db8-3887-acf2-59fbbcd0cb1c
/org/freedesktop/NetworkManager/ActiveConnection/1
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 --
-- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW
WIFI WWAN-HW WWAN
running 1.10.6 connected started full enabled enabled
enabled enabled enabled
---
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: nosotros 1116 F.... pulseaudio
/dev/snd/controlC1: nosotros 1116 F.... pulseaudio
CurrentDesktop: KDE
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=bb1531db-e7c0-48eb-a5b7-5afe3df47ba3
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2018-05-11 (6 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64
(20180426)
IpRoute:
default via 192.168.1.1 dev enp0s7 proto static metric 100
169.254.0.0/16 dev enp0s7 scope link metric 1000
192.168.1.0/24 dev enp0s7 proto kernel scope link src 192.168.1.3 metric 100
IwConfig:
enp0s7 no wireless extensions.
lo no wireless extensions.
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 04fc:0005 Sunplus Technology Co., Ltd USB
OpticalWheel Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
Package: network-manager 1.10.6-2ubuntu1
PackageArchitecture: amd64
PciNetwork:
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic
root=UUID=d1d6ad93-b21c-43cd-8410-782414a5f935 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
RelatedPackageVersions:
linux-restricted-modules-4.15.0-20-generic N/A
linux-backports-modules-4.15.0-20-generic N/A
linux-firmware 1.173
RfKill:
Tags: bionic
Uname: Linux 4.15.0-20-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/17/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.50
dmi.board.name: N68-S
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd07/17/2009:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68-S:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
nmcli-con:
NAME UUID TYPE
TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY
READONLY DBUS-PATH ACTIVE DEVICE STATE
ACTIVE-PATH SLAVE
Conexión cableada 1 1cc37db8-0db8-3887-acf2-59fbbcd0cb1c ethernet
1526562681 jue 17 may 2018 15:11:21 CEST yes 4294967196
no /org/freedesktop/NetworkManager/Settings/1 yes enp0s7 activated
/org/freedesktop/NetworkManager/ActiveConnection/1 --
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
enp0s7 ethernet connected /org/freedesktop/NetworkManager/Devices/2
Conexión cableada 1 1cc37db8-0db8-3887-acf2-59fbbcd0cb1c
/org/freedesktop/NetworkManager/ActiveConnection/1
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 --
-- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW
WIFI WWAN-HW WWAN
running 1.10.6 connected started full enabled enabled
enabled enabled enabled
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