[Bug 1905167] Re: htop shows 100% usage of systemd-udevd

[Lyubomir]

Okay, so i installed manually through terminal nvidia-drivers-455, which removed the old 450 and installed itself, then i rebooted. After reboot now htop doesn't show 100% constant of systemd-udevd, but shows between 20% to 80%, the medium looks like 50% CPU usage. In Journalctl there is constant nagging:
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: nvidia-nvlink: Nvlink Core is being initialized, major device number 236
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: The NVIDIA probe routine was not called for 1 device(s).
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: This can occur when a driver such as: 
                                                    NVRM: nouveau, rivafb, nvidiafb or rivatv 
                                                    NVRM: was loaded and obtained ownership of the NVIDIA device(s).
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: Try unloading the conflicting kernel module (and/or
                                                    NVRM: reconfigure your kernel without the conflicting
                                                    NVRM: driver(s)), then try loading the NVIDIA kernel module
                                                    NVRM: again.
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: No NVIDIA devices probed.
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: nvidia-nvlink: Unregistered the Nvlink Core, major device number 236
ное 23 23:48:22 lyubomir-Aspire-A515-51G systemd-udevd[709]: nvidia: Process '/sbin/modprobe nvidia-uvm' failed with exit code 1.
ное 23 23:48:22 lyubomir-Aspire-A515-51G systemd[1]: nvidia-persistenced.service: Start request repeated too quickly.
ное 23 23:48:22 lyubomir-Aspire-A515-51G systemd[1]: nvidia-persistenced.service: Failed with result 'exit-code'.
ное 23 23:48:22 lyubomir-Aspire-A515-51G systemd[1]: Failed to start NVIDIA Persistence Daemon.
ное 23 23:48:22 lyubomir-Aspire-A515-51G boinc[2398]: No protocol specified
ное 23 23:48:22 lyubomir-Aspire-A515-51G boinc[2398]: No protocol specified
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: nvidia-nvlink: Nvlink Core is being initialized, major device number 236
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: The NVIDIA probe routine was not called for 1 device(s).
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: This can occur when a driver such as: 
                                                    NVRM: nouveau, rivafb, nvidiafb or rivatv 
                                                    NVRM: was loaded and obtained ownership of the NVIDIA device(s).
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: Try unloading the conflicting kernel module (and/or
                                                    NVRM: reconfigure your kernel without the conflicting
                                                    NVRM: driver(s)), then try loading the NVIDIA kernel module
                                                    NVRM: again.
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: NVRM: No NVIDIA devices probed.
ное 23 23:48:22 lyubomir-Aspire-A515-51G kernel: nvidia-nvlink: Unregistered the Nvlink Core, major device number 236
ное 23 23:48:22 lyubomir-Aspire-A515-51G systemd-udevd[709]: nvidia: Process '/sbin/modprobe nvidia-modeset' failed with exit code 1.

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https://bugs.launchpad.net/bugs/1905167

Title:
  htop shows 100% usage of systemd-udevd

Status in nvidia-graphics-drivers-455 package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Invalid

Bug description:
  I'm attaching a perf profile.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.3
  ProcVersionSignature: Ubuntu 5.4.0-54.60-lowlatency 5.4.65
  Uname: Linux 5.4.0-54-lowlatency x86_64
  ApportVersion: 2.20.11-0ubuntu27.12
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Sun Nov 22 13:57:47 2020
  InstallationDate: Installed on 2020-02-08 (287 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: Acer Aspire A515-51G
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-54-lowlatency root=/dev/mapper/vgubuntu-root ro quiet splash resume=UUID=f0e63db4-d3af-4977-a82a-5a46a3c677ae lockdown=confidentiality intel_iommu=on iommu=pt vfio-pci.ids=10de:1d10 vt.handoff=7
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /usr/lib/systemd/system/dnscrypt-proxy.service → /etc/systemd/system/dnscrypt-proxy.service.d/override.conf
   [EXTENDED]   /usr/lib/systemd/system/rc-local.service → /usr/lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /usr/lib/systemd/system/user at .service → /usr/lib/systemd/system/user at .service.d/timeout.conf
   
   3 overridden configuration files found.
  UpgradeStatus: Upgraded to focal on 2020-10-23 (29 days ago)
  dmi.bios.date: 01/03/2019
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.02
  dmi.board.asset.tag: Type2 - Board Serial Number
  dmi.board.name: Charmander_KL
  dmi.board.vendor: KBL
  dmi.board.version: V2.02
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V2.02
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.02:bd01/03/2019:svnAcer:pnAspireA515-51G:pvrV2.02:rvnKBL:rnCharmander_KL:rvrV2.02:cvnAcer:ct10:cvrV2.02:
  dmi.product.family: Aspire 5
  dmi.product.name: Aspire A515-51G
  dmi.product.sku: 0000000000000000
  dmi.product.version: V2.02
  dmi.sys.vendor: Acer
  mtime.conffile..etc.apport.crashdb.conf: 2020-05-15T09:41:35.683742
  mtime.conffile..etc.systemd.sleep.conf: 2020-09-26T18:33:31.018002

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