Yep I somehow had that set in my /etc/environment (don't ever remember setting it though). I removed it and rebooted and performance has gotten slightly better but now the logs are being spammed with "Meta.Rectangle is deprecated, use Mtk.Rectangle instead" from the bug you linked. Gnome-shell's CPU usage doesn't get as high as previously, it now ends up getting to around 50±% but is accompanied by a spike in systemd- journald so I guess that points to the log spam causing the slowdown on my machine. The spikes mainly occur when going into the overview and switching workspaces.
I expect lower end/older systems would feel this the most, with newer systems not noticing any significant slowdown on the desktop. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2034722 Title: High CPU usage causing slowdown Status in gnome-shell package in Ubuntu: Incomplete Bug description: I have been experiencing high CPU usage from gnome-shell since upgrading to Mantic. htop shows gnome-shell consuming around 120% of the CPU. This ends up resulting a very sluggish feeling desktop. # System Details Report --- ## Report details - **Date generated:** 2023-09-07 16:31:07 ## Hardware Information: - **Hardware Model:** Apple Inc. MacBookPro12,1 - **Memory:** 8.0 GiB - **Processor:** Intel® Core™ i5-5257U × 4 - **Graphics:** Intel® Iris® Graphics 6100 (BDW GT3) - **Disk Capacity:** (null) ## Software Information: - **Firmware Version:** 184.0.0.0.0 - **OS Name:** Ubuntu Mantic Minotaur (development branch) - **OS Build:** (null) - **OS Type:** 64-bit - **GNOME Version:** 45.rc - **Windowing System:** Wayland - **Kernel Version:** Linux 6.3.0-7-generic ProblemType: Bug DistroRelease: Ubuntu 23.10 Package: gnome-shell 45~rc-0ubuntu1 ProcVersionSignature: Ubuntu 6.3.0-7.7-generic 6.3.5 Uname: Linux 6.3.0-7-generic x86_64 ApportVersion: 2.27.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Sep 7 16:25:02 2023 DisplayManager: gdm3 InstallationDate: Installed on 2022-03-31 (525 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1) RelatedPackageVersions: mutter-common 45~rc-0ubuntu1 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2034722/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
