** Patch added: "avahi-lp1799265-jammy.debdiff" https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1799265/+attachment/5919606/+files/avahi-lp1799265-jammy.debdiff
** Description changed: Currently running Kubuntu 18.10, Dell XPS 13 9350 Since updating from Kubuntu 18.04 to 18.10, the avahi-daemon has been consistently hampering network performance and using CPU for long periods of time. When booting machine from off state, avahi-daemon uses an entire CPU at max load for approx 10 minutes. During this time, internet connectivity via wifi is essentially unusable. The wifi connection is good, but it seems that http transactions are cutoff mid-way so no webpage is able to load. When waking from sleep, the avahi-daemon causes similar symptoms, but with less than 1 full cpu usage, and with somewhat less degraded network performance, but still quite unusable. I have never had issues with avahi prior to the 18.10 upgrade, so I am fairly confident the issue is rooted in that change. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: avahi-daemon 0.7-4ubuntu2 ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 CurrentDesktop: KDE Date: Mon Oct 22 10:00:34 2018 InstallationDate: Installed on 2017-07-24 (455 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 LD_PRELOAD=<set> SHELL=/bin/bash SourcePackage: avahi UpgradeStatus: Upgraded to cosmic on 2018-10-20 (2 days ago) [ Impact ] - * avahi-daemon consumes a large amount of CPU over time, particularly - on laptop/desktop use cases + * avahi-daemon consumes a large amount of CPU over time, particularly + on laptop/desktop use cases. Many reports of it burning 100% CPU. In + some cases it may also lead to increased network traffic that can impact + WiFi networks if you have many Ubuntu laptops on the same network. - * This issue was fixed long ago fixed upstream, in Debian and in + * This issue was fixed long ago fixed upstream, in Debian and in Kinetic+ but not previously backported to Jammy. [ Test Plan ] - * It is not easy to reproduce the issue on demand, it tends to happen + * It is not easy to reproduce the issue on demand, it tends to happen at random, only on busy networks possibly after many days or more of uptime. I don't currently have a way to easily reproduce the issue for SRU verification. - * Upstream bug/diagnosis: https://bugs-devel.debian.org/cgi- + * Upstream bug/diagnosis: https://bugs-devel.debian.org/cgi- bin/bugreport.cgi?bug=993051 [ Where problems could occur ] - * This patch is a single line change for a missing cleanup, that has + * This patch is a single line change for a missing cleanup, that has shipped in Kinetic+ for several years - * The version shipping in those releases is substantially similar to + * The version shipping in those releases is substantially similar to the current release (no new upstream release) - * However: avahi-daemon is a default installed package on Desktops, so + * However: avahi-daemon is a default installed package on Desktops, so there is a high potential impact [ Other Info ] - * None + * Upstream commit: https://github.com/avahi/avahi/pull/366 + * Originally diagnosed/resolved in the Debian bug: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1799265 + * This patch ships in later versions (even the current version), however I renamed the patch to prefix the LP bug number per the preferences, and added DEP3 headers. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799265 Title: avahi-daemon high cpu, unusable networking To manage notifications about this bug go to: https://bugs.launchpad.net/avahi/+bug/1799265/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
