Public bug reported: When the screen lock (i3lock) is active and dunst queues a large number of messages, the CPU runs very hot. It is not unusual to hear the fan running on an otherwise quiescent machine and, on unlocking, to see the screen covered with dunst alerts (kind, though sometimes too many to read before they timeout) and the CPU load well above one, with top showing dunst chewing most of the CPU.
When the alerts dismiss, dunst drops its CPU usage to near zero and system load falls back to some reasonable quiescent level. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: dunst 1.4.1-1 ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106 Uname: Linux 5.4.0-73-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.17 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: i3 Date: Wed Jun 2 13:45:22 2021 EcryptfsInUse: Yes InstallationDate: Installed on 2015-10-23 (2048 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: dunst UpgradeStatus: Upgraded to focal on 2020-06-04 (362 days ago) ** Affects: dunst (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930577 Title: CPU usage spikes with pending messages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dunst/+bug/1930577/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs