Persists on a freshly reinstalled system. Output from ping -i6 [host] follows. Note the spike in ping time and high packet loss.
64 bytes from [host]: icmp_seq=3833 ttl=64 time=0.223 ms 64 bytes from [host]: icmp_seq=3834 ttl=64 time=0.212 ms 64 bytes from [host]: icmp_seq=3835 ttl=64 time=0.156 ms 64 bytes from [host]: icmp_seq=3836 ttl=64 time=0.347 ms 64 bytes from [host]: icmp_seq=3837 ttl=64 time=0.216 ms 64 bytes from [host]: icmp_seq=3838 ttl=64 time=0.316 ms 64 bytes from [host]: icmp_seq=3839 ttl=64 time=0.320 ms 64 bytes from [host]: icmp_seq=3840 ttl=64 time=0.168 ms 64 bytes from [host]: icmp_seq=3841 ttl=64 time=336 ms 64 bytes from [host]: icmp_seq=3843 ttl=64 time=216 ms 64 bytes from [host]: icmp_seq=3845 ttl=64 time=515 ms 64 bytes from [host]: icmp_seq=3846 ttl=64 time=423 ms 64 bytes from [host]: icmp_seq=3847 ttl=64 time=498 ms 64 bytes from [host]: icmp_seq=3849 ttl=64 time=569 ms 64 bytes from [host]: icmp_seq=3851 ttl=64 time=532 ms 64 bytes from [host]: icmp_seq=3853 ttl=64 time=496 ms 64 bytes from [host]: icmp_seq=3855 ttl=64 time=502 ms 64 bytes from [host]: icmp_seq=3857 ttl=64 time=424 ms 64 bytes from [host]: icmp_seq=3859 ttl=64 time=346 ms 64 bytes from [host]: icmp_seq=3861 ttl=64 time=352 ms 64 bytes from [host]: icmp_seq=3863 ttl=64 time=358 ms 64 bytes from [host]: icmp_seq=3865 ttl=64 time=573 ms 64 bytes from [host]: icmp_seq=3867 ttl=64 time=495 ms 64 bytes from [host]: icmp_seq=3869 ttl=64 time=627 ms 64 bytes from [host]: icmp_seq=3871 ttl=64 time=465 ms 64 bytes from [host]: icmp_seq=3873 ttl=64 time=261 ms 64 bytes from [host]: icmp_seq=3875 ttl=64 time=518 ms 64 bytes from [host]: icmp_seq=3877 ttl=64 time=440 ms 64 bytes from [host]: icmp_seq=3879 ttl=64 time=400 ms 64 bytes from [host]: icmp_seq=3881 ttl=64 time=410 ms 64 bytes from [host]: icmp_seq=3883 ttl=64 time=542 ms 64 bytes from [host]: icmp_seq=3885 ttl=64 time=338 ms 64 bytes from [host]: icmp_seq=3887 ttl=64 time=511 ms 64 bytes from [host]: icmp_seq=3889 ttl=64 time=475 ms 64 bytes from [host]: icmp_seq=3891 ttl=64 time=230 ms 64 bytes from [host]: icmp_seq=3893 ttl=64 time=571 ms 64 bytes from [host]: icmp_seq=3894 ttl=64 time=564 ms 64 bytes from [host]: icmp_seq=3896 ttl=64 time=598 ms 64 bytes from [host]: icmp_seq=3898 ttl=64 time=604 ms 64 bytes from [host]: icmp_seq=3900 ttl=64 time=317 ms 64 bytes from [host]: icmp_seq=3902 ttl=64 time=239 ms 64 bytes from [host]: icmp_seq=3904 ttl=64 time=538 ms 64 bytes from [host]: icmp_seq=3906 ttl=64 time=795 ms 64 bytes from [host]: icmp_seq=3907 ttl=64 time=453 ms 64 bytes from [host]: icmp_seq=3909 ttl=64 time=571 ms 64 bytes from [host]: icmp_seq=3911 ttl=64 time=535 ms 64 bytes from [host]: icmp_seq=3913 ttl=64 time=373 ms 64 bytes from [host]: icmp_seq=3915 ttl=64 time=463 ms 64 bytes from [host]: icmp_seq=3917 ttl=64 time=385 ms 64 bytes from [host]: icmp_seq=3919 ttl=64 time=265 ms 64 bytes from [host]: icmp_seq=3921 ttl=64 time=564 ms 64 bytes from [host]: icmp_seq=3923 ttl=64 time=444 ms 64 bytes from [host]: icmp_seq=3925 ttl=64 time=367 ms 64 bytes from [host]: icmp_seq=3927 ttl=64 time=0.123 ms 64 bytes from [host]: icmp_seq=3928 ttl=64 time=0.284 ms 64 bytes from [host]: icmp_seq=3929 ttl=64 time=0.239 ms 64 bytes from [host]: icmp_seq=3930 ttl=64 time=0.214 ms 64 bytes from [host]: icmp_seq=3931 ttl=64 time=0.280 ms 64 bytes from [host]: icmp_seq=3932 ttl=64 time=0.314 ms 64 bytes from [host]: icmp_seq=3933 ttl=64 time=0.318 ms 64 bytes from [host]: icmp_seq=3934 ttl=64 time=0.318 ms 64 bytes from [host]: icmp_seq=3935 ttl=64 time=0.312 ms 64 bytes from [host]: icmp_seq=3936 ttl=64 time=0.218 ms 64 bytes from [host]: icmp_seq=3937 ttl=64 time=0.221 ms 64 bytes from [host]: icmp_seq=3938 ttl=64 time=0.308 ms 64 bytes from [host]: icmp_seq=3939 ttl=64 time=0.329 ms 64 bytes from [host]: icmp_seq=3940 ttl=64 time=0.244 ms 64 bytes from [host]: icmp_seq=3941 ttl=64 time=0.235 ms 64 bytes from [host]: icmp_seq=3942 ttl=64 time=0.250 ms 64 bytes from [host]: icmp_seq=3943 ttl=64 time=0.309 ms 64 bytes from [host]: icmp_seq=3944 ttl=64 time=0.132 ms 64 bytes from [host]: icmp_seq=3945 ttl=64 time=0.228 ms 64 bytes from [host]: icmp_seq=3946 ttl=64 time=0.223 ms 64 bytes from [host]: icmp_seq=3947 ttl=64 time=0.202 ms 64 bytes from [host]: icmp_seq=3948 ttl=64 time=0.211 ms 64 bytes from [host]: icmp_seq=3949 ttl=64 time=0.245 ms 64 bytes from [host]: icmp_seq=3950 ttl=64 time=0.248 ms 64 bytes from [host]: icmp_seq=3951 ttl=64 time=0.186 ms 64 bytes from [host]: icmp_seq=3952 ttl=64 time=0.192 ms 64 bytes from [host]: icmp_seq=3953 ttl=64 time=0.321 ms 64 bytes from [host]: icmp_seq=3954 ttl=64 time=0.231 ms 64 bytes from [host]: icmp_seq=3955 ttl=64 time=0.309 ms 64 bytes from [host]: icmp_seq=3956 ttl=64 time=0.307 ms 64 bytes from [host]: icmp_seq=3957 ttl=64 time=0.154 ms 64 bytes from [host]: icmp_seq=3958 ttl=64 time=0.189 ms 64 bytes from [host]: icmp_seq=3959 ttl=64 time=0.303 ms 64 bytes from [host]: icmp_seq=3960 ttl=64 time=0.197 ms 64 bytes from [host]: icmp_seq=3961 ttl=64 time=0.319 ms 64 bytes from [host]: icmp_seq=3962 ttl=64 time=0.205 ms 64 bytes from [host]: icmp_seq=3963 ttl=64 time=0.314 ms 64 bytes from [host]: icmp_seq=3964 ttl=64 time=0.316 ms 64 bytes from [host]: icmp_seq=3965 ttl=64 time=0.222 ms 64 bytes from [host]: icmp_seq=3966 ttl=64 time=499 ms 64 bytes from [host]: icmp_seq=3968 ttl=64 time=463 ms 64 bytes from [host]: icmp_seq=3970 ttl=64 time=301 ms 64 bytes from [host]: icmp_seq=3972 ttl=64 time=600 ms 64 bytes from [host]: icmp_seq=3974 ttl=64 time=438 ms 64 bytes from [host]: icmp_seq=3976 ttl=64 time=570 ms 64 bytes from [host]: icmp_seq=3978 ttl=64 time=408 ms 64 bytes from [host]: icmp_seq=3980 ttl=64 time=582 ms 64 bytes from [host]: icmp_seq=3982 ttl=64 time=420 ms 64 bytes from [host]: icmp_seq=3984 ttl=64 time=258 ms 64 bytes from [host]: icmp_seq=3986 ttl=64 time=473 ms 64 bytes from [host]: icmp_seq=3988 ttl=64 time=312 ms 64 bytes from [host]: icmp_seq=3990 ttl=64 time=318 ms 64 bytes from [host]: icmp_seq=3992 ttl=64 time=491 ms 64 bytes from [host]: icmp_seq=3994 ttl=64 time=622 ms 64 bytes from [host]: icmp_seq=3996 ttl=64 time=136 ms 64 bytes from [host]: icmp_seq=3997 ttl=64 time=0.329 ms 64 bytes from [host]: icmp_seq=3998 ttl=64 time=0.214 ms 64 bytes from [host]: icmp_seq=3999 ttl=64 time=0.302 ms 64 bytes from [host]: icmp_seq=4000 ttl=64 time=0.206 ms 64 bytes from [host]: icmp_seq=4001 ttl=64 time=0.317 ms 64 bytes from [host]: icmp_seq=4002 ttl=64 time=0.225 ms 64 bytes from [host]: icmp_seq=4003 ttl=64 time=0.313 ms 64 bytes from [host]: icmp_seq=4004 ttl=64 time=0.236 ms 64 bytes from [host]: icmp_seq=4005 ttl=64 time=0.229 ms 64 bytes from [host]: icmp_seq=4006 ttl=64 time=0.231 ms 64 bytes from [host]: icmp_seq=4007 ttl=64 time=0.208 ms 64 bytes from [host]: icmp_seq=4008 ttl=64 time=0.216 ms 64 bytes from [host]: icmp_seq=4009 ttl=64 time=0.314 ms 64 bytes from [host]: icmp_seq=4010 ttl=64 time=0.315 ms 64 bytes from [host]: icmp_seq=4011 ttl=64 time=0.184 ms 64 bytes from [host]: icmp_seq=4012 ttl=64 time=0.142 ms 64 bytes from [host]: icmp_seq=4013 ttl=64 time=0.217 ms 64 bytes from [host]: icmp_seq=4014 ttl=64 time=0.154 ms 64 bytes from [host]: icmp_seq=4015 ttl=64 time=0.210 ms -- 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/1804280 Title: intermittent periods of packet loss and high latency Status in linux package in Ubuntu: Confirmed Status in network-manager package in Ubuntu: Confirmed 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 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 [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.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 [removed] 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 --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dan 2053 F.... pulseaudio /dev/snd/pcmC1D0c: dan 2053 F...m pulseaudio /dev/snd/controlC1: dan 2053 F.... pulseaudio CurrentDesktop: KDE DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=4eadd7fe-e046-471d-b0ee-f1c85365411e 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.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true Package: network-manager 1.10.6-2ubuntu1.1 PackageArchitecture: amd64 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-39-generic root=UUID=89b1b98c-8c19-4200-966b-190a0ca44440 ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-39-generic N/A linux-backports-modules-4.15.0-39-generic N/A 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.:bvr2.11.1:bd08/17/2018:svnDellInc.:pnPrecisionTower3420:pvr:rvnDellInc.:rn08K0X7:rvrA00:cvnDellInc.:ct3:cvr: 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/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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804280/+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
