Everything was running fine until this evening. Nothing obvious that could have triggered it.
I did not have any extensions in ~/.local/share/gnome-shell/extensions, so I disabled all of the ones found through gnome-extensions list --enabled. It reduced the CPU usage of the gnome-shell process a bit, but didn't change the overall high usage. I recorded a few seconds of CPU usage graph for the top 5 processes with high CPU load according to htop and plotted a graph using procpath (see attachment). You can see that multiple processes are affected and have insanely high CPU load. Processes are: 2447 - /usr/bin/pulseaudio 2589 - /usr/lib/xorg/Xorg 2771 - /usr/bin/gnome-shell 4641 - /snap/chromium/... 32369 - /usr/share/dbeaver-ce I killed all of them, including gnome-shell and X, but it didn't change the overall behaviour. Killing X (logging back in again after that), resulted in low CPU load across all 8 cores, but as soon as I started chromium it went up to 100% on all cores and stayed like that for at least 45 seconds. All while everything GUI related appears super laggy. My guess is, that something is faulty around X, maybe even at a lower level. ** Attachment added: "procpath plot" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2047696/+attachment/5737445/+files/cpu.svg -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2047696 Title: [Lenovo ThinkPad E14 Gen 2] Entire system becomes laggy for unknown reason To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2047696/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
