Public bug reported:
Intermittently and unpredictably, ping response times and packet loss
will spike to unusable levels. Normal ping times are about .25 ms for
other hosts on the local network, with essentially no packet loss.
During the problematic periods (usually lasting 2-10 minutes), packet
loss jumps to about 50% and ping response times on the packets that
aren't dropped jump to between 250 and 750 ms.
This behavior started when I upgraded from Kubuntu 16.04 to Kubuntu
18.04. Changing which host on the network I test this with has no
effect (and during this, those other hosts are able to use the network
without any problem). Replacing the cable changes nothing. Using a
different Ethernet interface changes nothing. Replacing the switch
changes nothing. This is almost certainly not a hardware problem.
There is a chance that using wireless instead of Ethernet would fix the
issue, but I have been avoiding that since the wired connection is much
faster when Kubuntu is not malfunctioning.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: network-manager 1.10.6-2ubuntu1.1
ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
Uname: Linux 4.15.0-39-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Nov 20 12:48:05 2018
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2016-12-09 (711 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IpRoute:
default via 192.168.4.1 dev enp0s31f6 proto dhcp metric 100
169.254.0.0/16 dev enp0s31f6 scope link metric 1000
192.168.4.0/24 dev enp0s31f6 proto kernel scope link src 192.168.4.42 metric
100
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to bionic on 2018-08-19 (92 days ago)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
enp0s31f6 ethernet connected
/org/freedesktop/NetworkManager/Devices/2 Wired connection 1
2e0d0ce3-8ee2-3c06-815d-eb9a42873b3b
/org/freedesktop/NetworkManager/ActiveConnection/5
B0:48:1A:D8:81:FB bt disconnected
/org/freedesktop/NetworkManager/Devices/5 -- --
--
wlp3s0 wifi disconnected
/org/freedesktop/NetworkManager/Devices/4 -- --
--
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
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1804280
Title:
intermittent periods of packet loss and latency
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