[Bug 1759836] Re: systemd-udevd consumes 100% of CPU

[Gaétan QUENTIN]

on official bionic , upgraded from artful:

systemd-udevd eats lot cpu , trying to repeatly modprobe nvidia
indefinitly , while it  is not install in this computer :

it is on a usb bootable ssd disk. i boot it on several computers, some
have nvidia, some have not.

it was working fine with artfull and zesty.

i am using proprietary nvidia version 396


May  2 13:35:46 localhost kernel: [  866.436341] nvidia-nvlink: Nvlink Core is being initialized, major device number 240
May  2 13:35:46 localhost kernel: [  866.436566] NVRM: No NVIDIA graphics adapter found!
May  2 13:35:46 localhost kernel: [  866.436718] nvidia-nvlink: Unregistered the Nvlink Core, major device number 240
May  2 13:35:46 localhost kernel: [  866.506576] nvidia-nvlink: Nvlink Core is being initialized, major device number 240
May  2 13:35:46 localhost kernel: [  866.506832] NVRM: No NVIDIA graphics adapter found!
May  2 13:35:46 localhost kernel: [  866.506937] nvidia-nvlink: Unregistered the Nvlink Core, major device number 240
May  2 13:35:46 localhost systemd-udevd[19441]: Process '/usr/bin/nvidia-smi' failed with exit code 9.
May  2 13:35:46 localhost systemd[1]: nvidia-persistenced.service: Start request repeated too quickly.
May  2 13:35:46 localhost systemd[1]: nvidia-persistenced.service: Failed with result 'exit-code'.

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https://bugs.launchpad.net/bugs/1759836

Title:
  systemd-udevd consumes 100% of CPU

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  The systemd-udevd proccess consumes 100% of a thread everytime, but
  i'm not noticing any difference in my computer.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: systemd 237-3ubuntu6
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar 29 08:52:54 2018
  InstallationDate: Installed on 2018-03-05 (23 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180304)
  MachineType: Dell Inc. Inspiron N5010
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=3c29e292-f1ae-45e1-a0ed-a82524278ce1 ro quiet splash vt.handoff=1
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /lib/systemd/system/user at .service → /lib/systemd/system/user at .service.d/timeout.conf
   
   2 overridden configuration files found.
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/25/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A12
  dmi.board.name: 08R0GW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A12
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A12
  dmi.modalias: dmi:bvnDellInc.:bvrA12:bd01/25/2011:svnDellInc.:pnInspironN5010:pvrA12:rvnDellInc.:rn08R0GW:rvrA12:cvnDellInc.:ct8:cvrA12:
  dmi.product.name: Inspiron N5010
  dmi.product.version: A12
  dmi.sys.vendor: Dell Inc.

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