intermittent periods of packet loss and high latency
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
network-manager (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
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
ProcVersionSign
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 [removed] dev enp0s31f6 proto dhcp metric 100
169.254.0.0/16 dev enp0s31f6 scope link metric 1000
[removed]/24 dev enp0s31f6 proto kernel scope link src [removed] metric 100
NetworkManager.
[main]
NetworkingEnab
WirelessEnable
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/freedeskto
[removed] bt disconnected /org/freedeskto
wlp3s0 wifi disconnected /org/freedeskto
lo loopback unmanaged /org/freedeskto
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
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC1D0c: dan 2053 F...m pulseaudio
/dev/snd/
CurrentDesktop: KDE
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2016-12-09 (712 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
MachineType: Dell Inc. Precision Tower 3420
NetworkManager.
[main]
NetworkingEnab
WirelessEnable
WWANEnabled=true
Package: network-manager 1.10.6-2ubuntu1.1
PackageArchitec
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.173.2
Tags: bionic
Uname: Linux 4.15.0-39-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-08-19 (93 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 08/17/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.11.1
dmi.board.name: 08K0X7
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.family: Precision
dmi.product.name: Precision Tower 3420
dmi.sys.vendor: Dell Inc.
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
enp0s31f6 ethernet connected /org/freedeskto
B0:48:1A:D8:81:FB bt disconnected /org/freedeskto
wlp3s0 wifi disconnected /org/freedeskto
lo loopback unmanaged /org/freedeskto
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
summary: |
- intermittent periods of packet loss and latency + intermittent periods of packet loss and high latency |
description: | updated |
Removed some identifying information from log files.