[Bug 1774768] Re: systemd-udevd eats cpu in infinite loop when nvidia card is not plugged

Mon Apr 1 20:25:06 UTC 2019

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: systemd (Ubuntu)
       Status: New => Confirmed

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1774768

Title:
  systemd-udevd eats cpu in infinite loop  when nvidia card is not
  plugged

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  i have a roaming ssd disk ubuntu 18.04 with proprietaty nvidia drivers
  installed from ubuntu thid party repository:

  ii  nvidia-cuda-dev                  9.1.85-3ubuntu1            amd64        NVIDIA CUDA development files
  ii  nvidia-cuda-doc                  9.1.85-3ubuntu1            all          NVIDIA CUDA and OpenCL documentation
  ii  nvidia-cuda-gdb                  9.1.85-3ubuntu1            amd64        NVIDIA CUDA Debugger (GDB)
  ii  nvidia-cuda-toolkit              9.1.85-3ubuntu1            amd64        NVIDIA CUDA development toolkit
  ii  nvidia-dkms-396                  396.24-0ubuntu0~gpu18.04.1 amd64        NVIDIA DKMS package
  ii  nvidia-kernel-common-396         396.24-0ubuntu0~gpu18.04.1 amd64        Shared files used with the kernel module
  ii  nvidia-kernel-source-396         396.24-0ubuntu0~gpu18.04.1 amd64        NVIDIA kernel source package
  ii  nvidia-profiler                  9.1.85-3ubuntu1            amd64        NVIDIA Profiler for CUDA and OpenCL
  ii  nvidia-settings                  396.24-0ubuntu0~gpu18.04.1 amd64        Tool for configuring the NVIDIA graphics driver
  ii  nvidia-visual-profiler           9.1.85-3ubuntu1            amd64        NVIDIA Visual Profiler for CUDA and OpenCL
  r

  When i boot on my nvidia system , no problem.

  when i boot on other system , with other card, systemd-udevd eats lots
  cpu (nearby 100% or little more) and in logs i see infinite loop
  logging:

  Jun  2 11:23:16 localhost [19963]: failed to execute '/usr/bin/nvidia-smi' '/usr/bin/nvidia-smi': No such file or directory
  Jun  2 11:23:16 localhost systemd-udevd[492]: Process '/usr/bin/nvidia-smi' failed with exit code 2.
  Jun  2 11:23:16 localhost systemd[1]: nvidia-persistenced.service: Start request repeated too quickly.
  Jun  2 11:23:16 localhost systemd[1]: nvidia-persistenced.service: Failed with result 'exit-code'.
  Jun  2 11:23:16 localhost systemd[1]: Failed to start NVIDIA Persistence Daemon.
  Jun  2 11:23:16 localhost kernel: [ 2227.682538] nvidia-nvlink: Nvlink Core is being initialized, major device number 241
  Jun  2 11:23:16 localhost kernel: [ 2227.682917] NVRM: No NVIDIA graphics adapter found!
  Jun  2 11:23:16 localhost kernel: [ 2227.683149] nvidia-nvlink: Unregistered the Nvlink Core, major device number 241
  Jun  2 11:23:16 localhost systemd-udevd[492]: Process '/sbin/modprobe nvidia-modeset' failed with exit code 1.
  Jun  2 11:23:16 localhost kernel: [ 2227.756646] nvidia-nvlink: Nvlink Core is being initialized, major device number 241
  Jun  2 11:23:16 localhost kernel: [ 2227.756971] NVRM: No NVIDIA graphics adapter found!
  Jun  2 11:23:16 localhost kernel: [ 2227.757149] nvidia-nvlink: Unregistered the Nvlink Core, major device number 241
  Jun  2 11:23:16 localhost systemd-udevd[492]: Process '/sbin/modprobe nvidia-drm' failed with exit code 1.
  Jun  2 11:23:16 localhost kernel: [ 2227.824072] nvidia-nvlink: Nvlink Core is being initialized, major device number 241
  Jun  2 11:23:16 localhost kernel: [ 2227.824383] NVRM: No NVIDIA graphics adapter found!
  Jun  2 11:23:16 localhost kernel: [ 2227.824596] nvidia-nvlink: Unregistered the Nvlink Core, major device number 241
  Jun  2 11:23:16 localhost systemd-udevd[492]: Process '/sbin/modprobe nvidia-uvm' failed with exit code 1.
  Jun  2 11:23:16 localhost [19972]: failed to execute '/usr/bin/nvidia-smi' '/usr/bin/nvidia-smi': No such file or directory
  Jun  2 11:23:16 localhost systemd-udevd[492]: Process '/usr/bin/nvidia-smi' failed with exit code 2.
  Jun  2 11:23:16 localhost systemd[1]: nvidia-persistenced.service: Start request repeated too quickly.
  Jun  2 11:23:16 localhost systemd[1]: nvidia-persistenced.service: Failed with result 'exit-code'.
  Jun  2 11:23:16 localhost systemd[1]: Failed to start NVIDIA Persistence Daemon.

  the nvidia-uvm module is listed in /etc/modules.

  # /etc/modules: kernel modules to load at boot time.
  #
  # This file contains the names of kernel modules that should be loaded
  # at boot time, one per line. Lines beginning with "#" are ignored.
  nvidia-uvm

  it should just fail at boot time and do nothing else.

  when stopping systemd-udevd and starting it again, the problem disappear.

  i hadn't this problem with ubuntu 16.X/17.X.
   it may be a nvidia driver/software pb too, so i will do a bug report on nvidia driver too.

  Regards

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: udev 237-3ubuntu10
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  Uname: Linux 4.15.0-22-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.1
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  CustomUdevRuleFiles: 60-vlan-network-interface.rules 70-snap.core.rules
  Date: Sat Jun  2 11:16:41 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-04-25 (402 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  MachineType: GIGABYTE MRHM3AP
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-22-generic root=UUID=9ed36b5d-9fea-4544-b33c-a7c75c2cdfa5 ro rootflags=subvol=@ disablemodules=nouveau pci=noaer elevator=noop net.ifnames=0 ipv6.disable=1 quiet splash vt.handoff=1
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/29/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F7
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: MRHM3AP
  dmi.board.vendor: GIGABYTE
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd01/29/2014:svnGIGABYTE:pnMRHM3AP:pvrTobefilledbyO.E.M.:rvnGIGABYTE:rnMRHM3AP:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: MRHM3AP
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: GIGABYTE

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774768/+subscriptions