Those messages are bug 1857392, but it's a harmless symptom of other more important issues. Generally it means ubuntu-dock (or dash-to-dock) has restarted. This happens every time the screen is unlocked, but if it happens more regularly then it can mean the system is receiving monitor hotplugging events. This can happen with a badly connected monitor or low quality display cable. I would not call yours a flooded log though, since the issue is minutes apart it's more likely just the lock screen triggering bug 1857392. So not related to this bug.
Next: What apps are always running? Do you have any indicators in the top bar? ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- 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/2106293 Title: Gnome Shell eats 100% of the CPU on 22.04 Status in gnome-shell package in Ubuntu: Incomplete Bug description: Gnome shell eats 100% of the CPU this starts to happen after some days of the laptop up & running ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: xorg 1:7.7+23ubuntu2 ProcVersionSignature: Ubuntu 5.15.0-134.145-generic 5.15.173 Uname: Linux 5.15.0-134-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.6 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: unknown CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Sat Apr 5 13:16:43 2025 DistUpgraded: Fresh install DistroCodename: jammy DistroVariant: ubuntu DpkgLog: ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Lenovo HD Graphics 530 [17aa:5050] Subsystem: Lenovo GM108M [GeForce 940MX] [17aa:5050] InstallationDate: Installed on 2020-02-04 (1887 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: LENOVO 20FWS0A600 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-134-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/25/2022 dmi.bios.release: 2.37 dmi.bios.vendor: LENOVO dmi.bios.version: R07ET97W (2.37 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FWS0A600 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.4 dmi.modalias: dmi:bvnLENOVO:bvrR07ET97W(2.37):bd11/25/2022:br2.37:efr1.4:svnLENOVO:pn20FWS0A600:pvrThinkPadT460p:rvnLENOVO:rn20FWS0A600:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20FW_BU_Think_FM_ThinkPadT460p: dmi.product.family: ThinkPad T460p dmi.product.name: 20FWS0A600 dmi.product.sku: LENOVO_MT_20FW_BU_Think_FM_ThinkPad T460p dmi.product.version: ThinkPad T460p dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 23.2.1-1ubuntu3.1~22.04.3 version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.4-0ubuntu1~22.04.1 version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.13 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2106293/+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