[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Bug Watch Updater]

** Changed in: kernel
   Status: Confirmed => Expired

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Launchpad Bug Tracker]

This bug was fixed in the package bluez - 5.48-0ubuntu3.2

---
bluez (5.48-0ubuntu3.2) bionic; urgency=medium

  * d/p/lp1759836.patch: avoid endless udev events from new bind uevents
(LP: #1759836)

 -- Dan Streetman   Tue, 10 Sep 2019 17:25:22
-0400

** Changed in: bluez (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

thank you!  marking as verified for bionic :)

** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[David Killingsworth]

Dan,

I can confirm that after enabling proposed for bionic and then issuing
the command which installs bluez/5.48-0ubuntu3.2

$ sudo apt-get install bluez/bionic-proposed

The issue has been fixed for me.

I have a Dell Latitude E5400.

Thanks,
David

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

nobody who has been affected by this bug is able to test on Bionic?

@stan are you able to test using Bionic by any chance?

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[You-Sheng Yang]

** Tags added: ubuntu-certified

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

there's a lot of people subscribed to this bug, and presumably
interested in seeing it fixed on Bionic; can any of you please test with
the package from bionic-proposed and report the results?  Until you do,
it's unlikely this fix will be released into bionic-updates.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on
how to enable and use -proposed.

Or you can directly download the proposed debs from this (amd64) build page:
https://launchpad.net/ubuntu/+source/bluez/5.48-0ubuntu3.2/+build/17810460

please someone test on Bionic!

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Launchpad Bug Tracker]

This bug was fixed in the package bluez - 5.50-0ubuntu2.1

---
bluez (5.50-0ubuntu2.1) disco; urgency=medium

  * d/p/lp1759836.patch: avoid endless udev events from new bind uevents
(LP: #1759836)

 -- Dan Streetman   Tue, 10 Sep 2019 17:24:43
-0400

** Changed in: bluez (Ubuntu Disco)
   Status: Fix Committed => Fix Released

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

@stan thanks for testing on Disco.

if anyone can please test the package on Bionic, that would be
appreciated, this fix won't be released until someone affected by this
problem tests the proposed fix and verifies it fixes it.

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

** Tags removed: verification-needed-disco
** Tags added: verification-done-disco

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Tristan Hill via ubuntu-bugs]

Works for me with 5.50-0ubuntu2.1 on an old dell.

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

@yura9, @mauromol, or anyone experiencing this, if you are running
Bionic or Disco, can you please test with the 'bluez' package currently
in -proposed?  See the previous 2 comments for instructions how.

This bug does need someone affected by this bug (i.e. with the affected
hardware) to verify it before it's released.

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Brian Murray]

Hello Vinícius, or anyone else affected,

Accepted bluez into bionic-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/bluez/5.48-0ubuntu3.2
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: bluez (Ubuntu Bionic)
   Status: In Progress => Fix Committed

** Tags added: verification-needed-bionic

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Brian Murray]

Hello Vinícius, or anyone else affected,

Accepted bluez into disco-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/bluez/5.50-0ubuntu2.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-disco to verification-done-disco. If it does not fix
the bug for you, please add a comment stating that, and change the tag
to verification-failed-disco. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: bluez (Ubuntu Disco)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-disco

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Title:
  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

** Description changed:

- The systemd-udevd proccess consumes 100% of a thread everytime, but i'm
- not noticing any difference in my computer.
+ [impact]
+ 
+ on specific Dell systems, with a specific usb bluetooth device built-in,
+ the udev rule 'hid2hci' provided by the 'bluez' package causes an
+ endless loop of uevents resulting from 'bind' or 'unbind' kernel
+ uevents.  These new events were added to the kernel after the 'hid2hci'
+ udev rule was written.
+ 
+ [test case]
+ 
+ the specific Dell system is required to be able to reproduce this, or at
+ least the specific usb bluetooth hardware included in that system.
+ 
+ Reproducing this is reportedly easy, for example comment 75 indicates it
+ happens on every boot.
+ 
+ When this happens, any process monitor (e.g. ps, top, etc) will show the
+ 'udevd' process using 100% of a cpu, and 'udevadm monitor' should show
+ repeated 'bind' and 'unbind' events as mentioned in comment 39.
+ 
+ [regression potential]
+ 
+ as this alters what kernel uevents the 'hid2hci' udev rule processes,
+ regressions would involve the affected usb bluetooth device failing to
+ be set up, or otherwise not processing the uevents correctly.
+ 
+ [other info]
+ 
+ this is not fixed yet upstream, as of my last check, but has been
+ submitted upstream as mentioned in comment 95.
+ 
+ 
+ original 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@.service → 
/lib/systemd/system/user@.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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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Launchpad Bug Tracker]

This bug was fixed in the package bluez - 5.50-0ubuntu4

---
bluez (5.50-0ubuntu4) eoan; urgency=medium

  * d/p/lp1759836.patch: avoid endless udev events from new bind uevents
(LP: #1759836)

 -- Dan Streetman   Tue, 10 Sep 2019 17:22:37
-0400

** Changed in: bluez (Ubuntu Eoan)
   Status: In Progress => Fix Released

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

** Also affects: linux (Ubuntu Eoan)
   Importance: Low
   Status: Invalid

** Also affects: bluez (Ubuntu Eoan)
   Importance: Medium
 Assignee: Dan Streetman (ddstreet)
   Status: In Progress

** Also affects: systemd (Ubuntu Eoan)
   Importance: Undecided
   Status: Invalid

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
   Status: New

** Also affects: bluez (Ubuntu Disco)
   Importance: Undecided
   Status: New

** Also affects: systemd (Ubuntu Disco)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: bluez (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Also affects: systemd (Ubuntu Bionic)
   Importance: Undecided
   Status: New

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

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

** Changed in: linux (Ubuntu Disco)
   Status: New => Invalid

** Changed in: linux (Ubuntu Bionic)
   Status: New => Invalid

** Changed in: bluez (Ubuntu Disco)
   Importance: Undecided => Medium

** Changed in: bluez (Ubuntu Disco)
   Status: New => In Progress

** Changed in: bluez (Ubuntu Disco)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: bluez (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: bluez (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: bluez (Ubuntu Bionic)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

> Sorry for the late reply. Here comes the output:
> KERNEL[90619.640204] remove /module/nvidia (module)
> KERNEL[90619.696504] add /module/nvidia (module)

ok, your problem is that something is constantly adding and removing the
nvidia module (and, doing other related device processing).  That has
nothing to do with this bug's problem, which is ONLY for udev looping
due to rules in the bluez package's hid2hci rules file.  I updated the
bug subject to clarify that (scanning back through all the comments, I
think most if not all of the discussion focuses on this specific package
and rule).

You do seem to be having some other problem, which probably is with the
nvidia-persistenced.service, provided by the nvidia-compute-utils-NNN
package (with NNN being a number).  Check:

$ dpkg -l | grep nvidia

to see the specific package name/version on your system.  I don't really
know what the problem is there, but you could try removing the package
(if you don't need it), or searching for and/or opening a new bug for
the problem.

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

[Dan Streetman]

** Summary changed:

- systemd-udevd consumes 100% of CPU
+ systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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  systemd-udevd consumes 100% of CPU due to hid2hci udev rule from bluez

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

[Jón Bjarni Bjarnason]

Sorry for the late reply. Here comes the output:
KERNEL[90619.640204] remove   /module/nvidia (module)
UDEV  [90619.659490] add  /kernel/slab/:0012288 (slab)
KERNEL[90619.696504] add  /module/nvidia (module)
KERNEL[90619.697757] add  /kernel/slab/:0012288 (slab)
KERNEL[90619.697792] add  /bus/pci/drivers/nvidia-nvswitch (drivers)
KERNEL[90619.698144] remove   /bus/pci/drivers/nvidia-nvswitch (drivers)
UDEV  [90619.734780] add  /bus/pci/drivers/nvidia-nvswitch (drivers)
KERNEL[90619.760125] remove   /kernel/slab/:0012288 (slab)
KERNEL[90619.780134] remove   /module/nvidia (module)
UDEV  [90619.799634] add  /module/nvidia (module)
UDEV  [90619.863581] remove   /module/nvidia (module)
UDEV  [90619.914399] remove   /bus/pci/drivers/nvidia-nvswitch (drivers)
UDEV  [90619.980993] remove   /kernel/slab/:0012288 (slab)
KERNEL[90619.987727] add  
/kernel/slab/:A-256/cgroup/filp(351529:nvidia-persistenced.service) (cgroup)
KERNEL[90619.987765] add  
/kernel/slab/dentry/cgroup/dentry(351529:nvidia-persistenced.service) (cgroup)
KERNEL[90619.987787] add  
/kernel/slab/inode_cache/cgroup/inode_cache(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.987807] add  
/kernel/slab/:A-128/cgroup/pid(351529:nvidia-persistenced.service) (cgroup)
KERNEL[90619.987827] add  
/kernel/slab/sock_inode_cache/cgroup/sock_inode_cache(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.987846] add  
/kernel/slab/:A-0001024/cgroup/UNIX(351529:nvidia-persistenced.service) (cgroup)
KERNEL[90619.987873] add  
/kernel/slab/skbuff_head_cache/cgroup/skbuff_head_cache(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.987893] add  
/kernel/slab/kmalloc-512/cgroup/kmalloc-512(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.987918] add  
/kernel/slab/:A-192/cgroup/cred_jar(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.987938] add  
/kernel/slab/mm_struct/cgroup/mm_struct(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.987956] add  
/kernel/slab/:A-208/cgroup/vm_area_struct(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.988007] add  
/kernel/slab/:A-064/cgroup/anon_vma_chain(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.988029] add  
/kernel/slab/anon_vma/cgroup/anon_vma(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.988058] add  
/kernel/slab/kmalloc-192/cgroup/kmalloc-192(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.988076] add  
/kernel/slab/kmalloc-1k/cgroup/kmalloc-1k(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.988094] add  
/kernel/slab/task_struct/cgroup/task_struct(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.988113] add  
/kernel/slab/:A-080/cgroup/task_delay_info(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.988128] add  
/kernel/slab/:A-704/cgroup/files_cache(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.988144] add  
/kernel/slab/sighand_cache/cgroup/sighand_cache(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.988159] add  
/kernel/slab/:A-0001088/cgroup/signal_cache(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.989100] add  
/kernel/slab/shmem_inode_cache/cgroup/shmem_inode_cache(351529:nvidia-persistenced.service)
 (cgroup)
KERNEL[90619.989133] add  
/kernel/slab/:A-040/cgroup/pde_opener(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90619.989163] add  
/kernel/slab/kmalloc-4k/cgroup/kmalloc-4k(351529:nvidia-persistenced.service) 
(cgroup)
KERNEL[90620.018974] add  /module/nvidia (module)
KERNEL[90620.019912] add  /kernel/slab/:0012288 (slab)
KERNEL[90620.019938] add  /bus/pci/drivers/nvidia-nvswitch (drivers)
KERNEL[90620.020631] remove   /bus/pci/drivers/nvidia-nvswitch (drivers)
KERNEL[90620.080127] remove   /kernel/slab/:0012288 (slab)
KERNEL[90620.104154] remove   /module/nvidia (module)
KERNEL[90620.137366] add  /module/nvidia (module)
KERNEL[90620.138144] add  /kernel/slab/:0012288 (slab)
KERNEL[90620.138175] add  /bus/pci/drivers/nvidia-nvswitch (drivers)
KERNEL[90620.138657] remove   /bus/pci/drivers/nvidia-nvswitch (drivers)


** Attachment added: "longer log"
   
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/+attachment/5287861/+files/udevd.log

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  systemd-udevd consumes 100% of CPU

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

[Dan Streetman]

> I tried your fix Dan and it seems not to work.

hmm, can you run this cmd and capture a bit of output to paste here?  it
probably will generate a lot of output that repeats, so just pasting a
short bit of it should be enough:

$ sudo udevadm monitor

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

[Bug Watch Updater]

** Changed in: bluez (Debian)
   Status: Unknown => New

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

[Jón Bjarni Bjarnason]

Hi

I tried your fix Dan and it seems not to work. I am running on popOs
19.04 (Dell latitude E6530 i7)

kernel vers: Linux 5.0.0-25-generic x86_64

$ sudo apt-cache policy bluez
bluez:
  Installed: 5.50-0ubuntu2+bug1759836v20190827b1~disco

from top: 
488 root  20   0   66264  51564   3208 R 100.0   0.4  18:10.64 systemd-udevd

I previously disabled the bluetooth in the bios.

This is my .rules file (after the update):

# do not edit this file, it will be overwritten on update

ACTION!="add", GOTO="hid2hci_end"
SUBSYSTEM!="usb*", GOTO="hid2hci_end"

# Variety of Dell Bluetooth devices - match on a mouse device that is
# self powered and where a HID report needs to be sent to switch modes
# Known supported devices: 413c:8154, 413c:8158, 413c:8162
ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", 
ATTR{bInterfaceProtocol}=="02", \
  ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c", 
ATTRS{bmAttributes}=="e0", \
  RUN+="hid2hci --method=dell --devpath=%p", ENV{HID2HCI_SWITCH}="1"

# Logitech devices
KERNEL=="hiddev*", ATTRS{idVendor}=="046d", 
ATTRS{idProduct}=="c70[345abce]|c71[3bc]", \
  RUN+="hid2hci --method=logitech-hid --devpath=%p"
# Logitech, Inc. diNovo Edge Keyboard
KERNEL=="hidraw*", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c7[01]4", \
  RUN+="hid2hci --method=logitech-hid --devpath=%p"

ENV{DEVTYPE}!="usb_device", GOTO="hid2hci_end"

# When a Dell device recovers from S3, the mouse child needs to be repoked
# Unfortunately the only event seen is the BT device disappearing, so the mouse
# device needs to be chased down on the USB bus.
ATTR{bDeviceClass}=="e0", ATTR{bDeviceSubClass}=="01", 
ATTR{bDeviceProtocol}=="01", ATTR{idVendor}=="413c", \
  ENV{REMOVE_CMD}="/sbin/udevadm trigger --action=change --subsystem-match=usb 
--property-match=HID2HCI_SWITCH=1"

# CSR devices
ATTR{idVendor}=="0a12|0458|05ac", ATTR{idProduct}=="1000", RUN+="hid2hci 
--method=csr --devpath=%p"

LABEL="hid2hci_end"

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

[Dan Streetman]

> that is a fix for me

excellent, thanks.  The patch there is the same idea as from comment 70, to 
only process the hid2hci rules on 'add' action events.  It's the same as was 
proposed upstream:
https://lore.kernel.org/patchwork/patch/902126/#1138115


The only thing needed now before merging this fix is for upstream to accept the 
patch, I sent an email to poke the mailing list.

https://lore.kernel.org/linux-
bluetooth/CAOZ2QJOZStRYa=5fyod_AEJcJQw90_yX40dPYY3Dhvfso1e=r...@mail.gmail.com/

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

[Yury Pavlov]

Great! Thank you, Dan, that is a fix for me.

My config:
Dell Studio 1558
Ubuntu MATE 18.04.3 LTS, Linux 5.0.0-25-generic x86_64
lsusb (partial):
Bus 001 Device 007: ID 413c:8160 Dell Computer Corp. Wireless 365 Bluetooth
Bus 001 Device 006: ID 413c:8162 Dell Computer Corp. Integrated Touchpad 
[Synaptics]
Bus 001 Device 005: ID 413c:8161 Dell Computer Corp. Integrated Keyboard
Bus 001 Device 003: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of 
BCM2046 Bluetooth)

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

[Dan Streetman]

As many have commented, this is almost certainly a bug in the bluez udev
rule 'hid2hci', that is caused by the introduction of 'bind' and
'unbind' uevents.

Can anyone who can reproduce this bug test with the bluez package from this ppa:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1759836

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

[Dan Streetman]

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

** Changed in: bluez (Ubuntu)
   Status: Invalid => Confirmed

** Changed in: bluez (Ubuntu)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: bluez (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: bluez (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
   Status: Incomplete => Invalid

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

[Karl Kastner]

Lenovo T510 with  4.18.0-25 is also effected, this strangely almost
freezes the GUI, despite that systemd-udevd only occupies one core

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

[Mauro]

Same problem here with Debian 10, Dell Inspiron 13 1370.
Workaround by Florian works for me too.

** Bug watch added: Debian Bug tracker #931304
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931304

** Also affects: bluez (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931304
   Importance: Unknown
   Status: Unknown

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

[August Pamplona]

Ignore my previous two posts.

It's fixed. I uninstalled & reinstalled Nvidia driver related things
(which didn't really want to happen).

I don't know why it happened nor why it produced symptoms related to one
of the posts here (maybe just an unrelated coincidence?) nor why it
happened when I moved the hard drive to the Dell laptop.

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

[August Pamplona]

OK, so this is annoying.

The background behind the report I made on 2018-07-03 (message #47) is
that I have had a Mint install on a desktop computer (fairly old
hardware) and that at some point I started to switch over to the Dell
Latitude E6400 laptop that I mentioned (just swap the hard drive, an
ssd). This just worked. This is something that didn't use to just work
with Linux many years ago and I was pleased that it now does.

At some point, it developed this high cpu use issue (I believe this
happened upon the switch to Mint 19 but earlier is possible since my
noticing this would depend on how often I tried using the hard drive
with the Mint install in the Dell laptop which at this point may not
have been that often).

I applied one fix mentioned here & the issue went away (although it
broke Bluetooth). I forgot about it for a while.

At some point, I created a full separate install on a USB flash drive
just to have an install to play with because I needed something Ubuntu
based (Mint being close enough for my purposes) —though I did choose to
go with Mate instead of Cinnamon (which is what I have on my main
install). Of course, I had the same issue again. I went back to this
thread to refresh my memory about fixing the issue and noticed the
slightly better fix for the issue mentioned in message #70. The fix
worked and I was glad to find that Bluetooth works.

So now came the time when I decided I will be using my main install from
my desktop in my laptop again for a period of time and I am surprised to
find that when it boots I am greeted with a message advising me that
it's "Running in software rendering mode" and that I should expect high
cpu use. Then I notice that I'm again having high cpu use even for
running in rendering mode (from ~45%-100% —and maybe going closer to
100% over time?).

Investigating this leads me,... right back to here. The issue with the
'/97-hid2hci.rules' is gone (having also applied the fis from message
#70 on this install) but now I seem to have the same issue as what
Gaétan QUENTIN writes about on this thread on message #7 on the date of
2018-05-02.

I attempted the fix from #9 and it did not work. I then attempted the
fix from #50 and it got rid of the repeating Nvidia messages mentioned
in #7 when executing 'sudo /lib/systemd/systemd-udevd -D'. However, the
message "Running in software rendering mode" and cpu use may have gone
down slightly but is still extremely high. I don't know how to get rid
of this. My inclination was to go to the Driver manager to try to enable
the recommended nvidia-340 binary driver but my only allowed choice is
'Continue using a manually installed driver' (the other options, the
NVIDIA binary driver and the Nouveau driver are greyed out and not
selectable).

Keep in mind that I did not have the issue with previous Mint versions
and keep in mind that, after applying the fix described in message #70,
a different install of the same Mint version number on the exact same
hardware does not have this problem (however, the difference could be
that this other install is using Mate).

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

[August Pamplona]

'However, the message "Running in software rendering mode" and cpu use
may have gone down slightly but is still extremely high.' should have
been written as 'However, the message "Running in software rendering
mode" remains and cpu use may have gone down slightly but is still
extremely high.'.

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

[Brad Figg]

** Tags added: cscc

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

[August Pamplona]

Mortimer, it's still available at the Google cache:
https://webcache.googleusercontent.com/search?https://webcache.googleusercontent.com/search?q=cache:Ulh1YXwMuK8J:https://dev.getsol.us/T5224

It appears that the fix there addresses the same file and the same line
in that file. However, the lines are simply being deleted there & it
breaks Bluetooth so I wouldn't go that route (though at the time I did
due to not knowing any better).

They are also placing it at a different location, /etc/udev/rules.d/,
and I don't know the significance of that.

And to address what others are saying, yes, hand editing a system file
(and one, at that, which is headed by the comment line "# do not edit
this file, it will be overwritten on update") is not an optimal
solution.

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

[Mortimer]

This is a problem for non-dell computers also.

18.04.2

kernel:
4.18.0-21

This link is down:
https://dev.solus-project.com/T5224

Was the workaround mentioned there different than the ones here?

-

Is there a bluetooth file that people can easily remove with Synaptic so
we don't have to tell them to go edit code? Part of the problem with
that is it will ask them to remove the network manager though and they
won't be able to get on the internet if they ok it.

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

[elios]

I'am not even able to install ubuntu 18.04 because of this, it keeps
printing the error message and it's stuck.

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

[SB]

still no fix :(

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

[Bored Individual]

I too can confirm that the solution Florian posted (modifying
/lib/udev/rules.d/97-hid2hci.rules) works.

Dell Latitude E6400, Ubuntu-Mate 18.04LTS with generic kernel (Linux
4.15.0-43-generic), udev/systemd version 237-3ubuntu10.11, bluez version
5.48-0ubuntu3.1

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

[Jeff Simpson]

I can confirm that the solution Florian posted (modifying
/lib/udev/rules.d/97-hid2hci.rules) works for me as well.

Dell Latitude E6500, Kubuntu 18.04 with hwe kernel (4.18.0-13-generic),
udev/systemd version 237-3ubuntu10.9, bluez version 5.48-0ubuntu3.1

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

[Kai-Heng Feng]

Florian,
So it works in udev-232 but not udev-233? Sounds like a regression.

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

[Florian Dittmer]

Had the same problem on Dell Latitude E6400 laptop using Gentoo Linux
with udev versions newer than udev-233. Disabling Bluetooth in BIOS
solved the issue, however, I need bluetooth. Researching the web
resulted in this page:

https://askubuntu.com/questions/1028883/ubuntu-18-04-systemd-udevd-uses-
high-cpu-conflict-with-wifi

Following the instructions mentioned by one user in the comments helped
me to solve the cpu load issue with udev-239 and kernel 4.18.17,  while
Bluetooth still works.

Run the following command:

/lib/systemd/systemd-udevd -D
 
This should print garbage in endless loop containing ".../97-hid2hci.rules:"

If so, edit /lib/udev/rules.d/97-hid2hci.rules

and add

ACTION=="add",

in front of line mentioned by above command.

In my case, I had to change the following lines in 97-hid2hci.rules
from:

ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", 
ATTR{bInterfaceProtocol}=="02", \
  ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c", 
ATTRS{bmAttributes}=="e0", \
  RUN+="hid2hci --method=dell --devpath=%p", ENV{HID2HCI_SWITCH}="1"

to:

ACTION=="add", ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", 
ATTR{bInterfaceProtocol}=="02", \
  ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c", 
ATTRS{bmAttributes}=="e0", \
  RUN+="hid2hci --method=dell --devpath=%p", ENV{HID2HCI_SWITCH}="1"

And this fixed the issue (after reboot).

Best regards
Florian

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Title:
  systemd-udevd consumes 100% of CPU

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

[Kai-Heng Feng]

Can you try comment out this section helps:
ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", 
ATTR{bInterfaceProtocol}=="02", \
  ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c", 
ATTRS{bmAttributes}=="e0", \
  RUN+="hid2hci --method=dell --devpath=%p", ENV{HID2HCI_SWITCH}="1"

and this section:
ATTR{bDeviceClass}=="e0", ATTR{bDeviceSubClass}=="01", 
ATTR{bDeviceProtocol}=="01", ATTR{idVendor}=="413c", \
  ENV{REMOVE_CMD}="/sbin/udevadm trigger --action=change --subsystem-match=usb 
--property-match=HID2HCI_SWITCH=1"

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  systemd-udevd consumes 100% of CPU

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

[Bored Individual]

Installed latest v4.19.1 with the added kernel parameter

** Attachment added: "dmesg_4.19.1.txt"
   
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/+attachment/5211268/+files/dmesg_4.19.1.txt

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  systemd-udevd consumes 100% of CPU

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

[Kai-Heng Feng]

Sounds like a kernel bug instead? Please boot with kernel parameter
`usbcore.dyndbg=+p` and attach dmesg.

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  systemd-udevd consumes 100% of CPU

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

[Bored Individual]

Forgot the quotes around 'EOF', tested and it works for me.
Make sure you check if the service is enabled

Run the following commands:
---
cat<<'EOF'>bugfix-1759836.service
[Unit]
Description=Fix for 
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836

[Service]
Type=oneshot
ExecStart=/bin/bash -c "services='systemd-udevd systemd-udevd-kernel.socket 
systemd-udevd-control.socket';systemctl stop $services;systemctl start 
$services"

[Install]
WantedBy=multi-user.target
EOF

sudo cp bugfix-1759836.service /etc/systemd/system
sudo systemctl enable bugfix-1759836.service

systemctl status bugfix-1759836.service
---
It should display something like:
  Loaded: loaded (/etc/systemd/system/bugfix-1759836.service; enabled; vendor 
preset: enabled)

After a reboot again run:
systemctl status bugfix-1759836.service

Hopefully they get this fixed soon.

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  systemd-udevd consumes 100% of CPU

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

[Richie Ward]

sudo systemctl stop systemd-udevd systemd-udevd-kernel.socket systemd-
udevd-control.socket

sudo systemctl start systemd-udevd systemd-udevd-kernel.socket systemd-
udevd-control.socket

Running this on startup seems to fix it.

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  systemd-udevd consumes 100% of CPU

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

[Richie Ward]

Reproduced on Dell Inspiron 13z / 1370. I can work around it by turning
off Bluetooth in BIOS.

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

[Bored Individual]

Is this launchpad thing even working, how long does it take to fix a bug
around here ?

This is untested but should work, let me know.
Execute the following commands, it will create a file called 
bugfix-1759836.service.
Copies it to /etc/systemd/system and enables it.

---
cat 

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

[Giovanni Panozzo]

I have the same problem on my old Dell Latitude E6400. Workaround at
post #55 fixes the problem until next reboot.

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

[QuentinHartman]

Found this lkml thread for other issues related to this change. It seems
the effort to run it down fizzled. What would be the best way to tie
this to that to hopefully raise visibility / priority?

https://lkml.org/lkml/2018/4/6/221

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  systemd-udevd consumes 100% of CPU

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

[QuentinHartman]

and here is the commit that adds these events that are causing us such
issues on the Dell hardware:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1455cf8dbfd06aa7651dcfccbadb7a093944ca65

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  systemd-udevd consumes 100% of CPU

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

[Bored Individual]

Still present in 4.19rc6, lets hope it gets fixed before 5.0.
If you guys want me to test things. Let me know.

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Title:
  systemd-udevd consumes 100% of CPU

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

[QuentinHartman]

I've found that just sticking with kernel 4.13 has been working fine for
me. It works around this problem and for my use case hasn't had any
downsides.

On Sun, Sep 23, 2018 at 2:15 PM SB <1759...@bugs.launchpad.net> wrote:

> why is this still not fixed, it is quite a showstopper on dell systems
>
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> Title:
>   systemd-udevd consumes 100% of CPU
>
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  systemd-udevd consumes 100% of CPU

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

[SB]

why is this still not fixed, it is quite a showstopper on dell systems

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  systemd-udevd consumes 100% of CPU

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

[August Pamplona]

But the directions mentioned elsewhere from https://dev.solus-
project.com/T5224 do work even thought they appear to break Bluetooth
(even with the updated instructions workaround mentioned in that
thread).

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  systemd-udevd consumes 100% of CPU

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

[August Pamplona]

Nope, getting rid of '/lib/udev/rules.d/71-nvidia.rules' does nothing.

It's a Mint 19 (Tara) with Cinnamon installation that I sometimes use on
a Dell E6400 which used to work well with it before with earlier
kernels.

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  systemd-udevd consumes 100% of CPU

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

[Christopher M. Penalver]

Vinícius Milanez Couto, in order to allow additional upstream mainline kernel 
developers to examine the issue, at your earliest convenience, could you please 
test the latest mainline kernel? Please keep in mind the following:
1) The one to test is in a folder at the very top of the page (not the daily 
folder).
2) The release names are irrelevant.
3) The folder time stamps aren't indicative of when the kernel actually was 
released upstream.
4) Install instructions are available at 
https://wiki.ubuntu.com/Kernel/MainlineBuilds .

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't 
boot into the OS) please make a comment in your report about this, and continue 
to test the next most recent kernel version until you can test to the issue. 
Once you've tested the mainline kernel, please comment on which kernel version 
specifically you tested. If this issue is not reproducible in the mainline 
kernel, please add the following tags by clicking on the yellow circle with a 
black pencil icon, next to the word Tags, located at the bottom of the Bug 
Description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is
the release candidate number if it exists.

If the issue is reproducible with the mainline kernel, please add the following 
tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.

Also, you don't need to apport-collect further unless specifically
requested to do so.

It is most helpful that after testing of the latest mainline kernel is
complete, you mark this report Status Confirmed.

Lastly, to keep this issue relevant to upstream, please continue to test
the latest mainline kernel as it becomes available.

Thank you for your help.

** Project changed: bluez => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: High => Undecided

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

** Changed in: linux (Ubuntu)
 Remote watch: Linux Kernel Bug Tracker #199035 => None

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
   Status: New => Incomplete

** Tags added: bios-outdated-a15 regression-potential

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  systemd-udevd consumes 100% of CPU

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

[Mikhail]

After some time CPU load grew to 100% again.

Have found another workaround which is working so far (disabling nvidia
rules for udev):

sudo mv /lib/udev/rules.d/71-nvidia.rules
/lib/udev/rules.d/71-nvidia.save

(and then restart).

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  systemd-udevd consumes 100% of CPU

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

[Mikhail]

gaetan-quentin's workaround helped me for now:

systemctl stop systemd-udevd
sudo apt remove *nvidia-compute-utils*
systemctl start systemd-udevd

(Lenovo P51)

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

[Bored Individual]

Got the same problem on a Dell E6400 Laptop.

Systemd-udevd climbs to 100% cpu usage in minutes, making it verify
difficult and horrible to install, if one can manage to find the
patience, only to find out that this problem persists after the
installation.

I could install after:

systemctl disable systemd-udevd.service
systemctl disable systemd-udevd-control.socket
systemctl disable systemd-udevd-kernel.socket
systemctl stop systemd-udevd.service
systemctl stop systemd-udevd-control.socket
systemctl stop systemd-udevd-kernel.socket
then kill -9 any systemd-udevd process that remained active

After this the installation went fine and fast.

Disabling bluetooth in the bios did not work for me.
Disabling wireless in the bios works to some extend, systemd-udevd takes around 
~50% cpu instead of 100%

Downgrade to 4.13 kernel worked like a charm, no problems after that.

I had some problems switching to the nvidia driver, so i had to stick
with nouveau (which works great)

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

[August Pamplona]

The issue also showed up with on my laptop. I was running Mint 19 (still
on the BETA) which is based on Bionic Beaver, kernel is
4.15.0-24-generic x86_64 bits with Cinnamon 3.8.6. I did try booting
with 4.15.0-22 and it made no difference (which, after reading the
comments here, I see is as expected)

The laptop is a Latitude E6400. It's one with the nVidia graphics. I
don't remember what the Bluetooth adapter is (it's something I added,
not necessarily something that would have come from Dell).

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  systemd-udevd consumes 100% of CPU

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

[Svip]

I am having a similar problem after upgrading to 18.04 on a Dell
Precision M4600, with the following specs:

- Intel Core i7 2640M
- NVidia Quadro 2000M

I have disabled Bluetooth entirely, because I don't need it.  But the
NVidia loading/unloading (add/remove) in udev keeps persisting.  I can
disable this by removing the nvidia-rules (71-nvidia-rules) from the
rules.d-directory, but that also disables the module entirely, and I
need the nvidia module, I just wish it would not unload.

This issue seems to be about Bluetooth, although plenty of mentions of
NVidia, should I create a separate one for the nvidia driver issue?

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  systemd-udevd consumes 100% of CPU

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

[Emerson Novais Oliveira via ubuntu-bugs]

I have a same problem too. My system is too slow and so overheated.

My machine:
Ubuntu 18.04
Vostro 3500
Intel Core i5 540m
NVidia GT-310m

Please, help me!

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

[Daniel Angio]

I had the same problem with 2 Dell of the year 2008

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

[Bug Watch Updater]

Launchpad has imported 7 comments from the remote bug at
https://bugzilla.kernel.org/show_bug.cgi?id=199035.

If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
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On 2018-03-06T21:09:45+00:00 mathieutournier wrote:

Created attachment 274593
dmesg

Hi,
I'm currently running ubuntu 18.04 with a 4.15 kernel and i can observe very 
high cpu usage to the  systemd-udevd deamon.

removing the rule :
ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", 
ATTR{bInterfaceProtocol}=="02", \
  ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c", 
ATTRS{bmAttributes}=="e0", \
  RUN+="hid2hci --method=dell --devpath=%p", ENV{HID2HCI_SWITCH}="1"

Solved the high CPU usage eventhough my bluetooth card is not available
anymore (as not in hci mode)

It seems that the command hid2hci creates a bind/unbind loop in udev
that is looping trying to set the device in hci mode. (that what udevadm
monitor seems to show, looping from bind to unbind for the device)

I suspect a0085f2510e8976614ad8f766b209448b385492f introduced a
regression (i have not tried to revert it yet).

Please not that there also seem to be a bug in hid2hci.c from bluez l148 :
if (err == 0) {
err = -1;
errno = EALREADY;
}
Correcting this and recompile bluez desn't solve the issue as cpu usage remains 
very high.

Using a 4.13 kernel result in a normal CPU usage, this seems a
regression in 4.14.

Other people seems to have the same issue, here is a bug report related to this 
:
https://dev.solus-project.com/T5224

Thanks a lot for your support,

Mathieu Tournier

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https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/comments/0


On 2018-05-04T05:57:10+00:00 boro wrote:

I have the very same problem using the same distro (Ubuntu 18.04,
64-bit) on Dell Latitude E5400 laptop. Disabling BT from BIOS or
removing the aforementioned rule solves the problem but leaves BT
unusable.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/comments/13


On 2018-05-09T23:02:06+00:00 lucent wrote:

Bus 001 Device 009: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of 
BCM2046 Bluetooth)
Bus 001 Device 004: ID 0a5c: Broadcom Corp. 

Linux zontar 4.16.0-1-amd64 #1 SMP Debian 4.16.5-1 (2018-04-29) x86_64
GNU/Linux

May 09 15:59:00 hostname upowerd[14610]: unhandled action 'bind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.6/1-1.6.2/1-1.6.2:1.0
May 09 15:59:00 hostname upowerd[14610]: unhandled action 'unbind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.6/1-1.6.2/1-1.6.2:1.0
May 09 15:59:00 hostname upowerd[14610]: unhandled action 'bind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.6/1-1.6.2/1-1.6.2:1.0
May 09 15:59:00 hostname upowerd[14610]: unhandled action 'unbind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.6/1-1.6.2/1-1.6.2:1.0
...repeating...

15632 root  20   0  233136 186656   2664 R  94.1%   4.7%  62:14.67 
systemd-udevd   
  
16222 root  20   0   88252   2432   1888 R  35.3%   0.1%  25:21.87 
systemd-udevd   
  

Looks like same problem affects this Dell Precision M6500 laptop.

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On 2018-05-20T07:57:41+00:00 f.dittmer wrote:

I observed the high cpu usage after upgrading from udev-233 to 
udev-236/udev-238 on Gentoo Linux. Downgrading back to udev-233 lets me use 
newer kernels (currently running 4.15.18) without any problems.
Using DELL Latitude E6400 from 2009, with same Broadcom Bluetooth module as 
mentioned above.

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https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/comments/27


On 2018-06-13T16:50:40+00:00 rickfharris wrote:

As per https://patchwork.kernel.org/patch/10384111/ editing
97-hid2hci.rules as follows works around the new uevents added to the
kernel in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1455cf8dbfd06aa7651dcfccbadb7a093944ca65

-ACTION=="remove", GOTO="hid2hci_end"
+ACTION!="add", GOTO="hid2hci_end"

Bluetooth now works with kernels above and below 4.14.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1759836/comments/40


On 

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

[Rick Harris]

As per https://patchwork.kernel.org/patch/10384111/ message from Bluez
mailing list, editing 97-hid2hci.rules as follows works around the new
uevents added to the kernel in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1455cf8dbfd06aa7651dcfccbadb7a093944ca65

-ACTION=="remove", GOTO="hid2hci_end"
+ACTION!="add", GOTO="hid2hci_end"

Bluetooth now works with kernels above and below 4.14.

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

[David Matějček]

I had this problem with NVidia after I disabled nvidia card in BIOS.

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

[gveiga Ubuntu]

Same problem with an old  Dell Inspiron 1545 recently upgraded to Ubuntu
18.04 (4.15.0-22-generic). After disabling Bluetooth in the Bios and
removing package Bluez, system is usable again.

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

[Gaétan QUENTIN]

on bionic, stopping udevd and starting it again correct the problem:

sudo systemctl stop systemd-udevd systemd-udevd-control.socket 
systemd-udevd-kernel.socket
sudo systemctl start systemd-udevd systemd-udevd-control.socket 
systemd-udevd-kernel.socket

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

[Chainick]

Removing the bluez package solves the problem for me. After that
bluetooth does not work, of course.

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

[JR]

I tried it with mainline 4.16.12 and 4.17-rc7 on the Dell Latitude and
the problem still exists.

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

[Andrea Bocci]

And it seems to be fixed also in the current stable kernel, 4.16.11 .

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

[Andrea Bocci]

FYI: running with the 4.17-rc6 release candidate of the new kernel from
https://wiki.ubuntu.com/Kernel/MainlineBuilds seems to have fixed the
issue for me.

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

[QuentinHartman]

You need to actually downgrade your running kernel to 4.13. Just
downgrading the headers isn't enough.

QH

On Sat, May 26, 2018 at 1:22 PM, Jesse McNichol 
wrote:

> Similar problem for me. Dell E6530, Ubuntu 18.04
>
> Downgraded to 4.13 headers as suggested above, disabled bluetooth in
> BIOS as suggested by others. Neither workaround helped. Computer still
> producing excess heat and systemd-udevd climbs to nearly 100% CPU usage
> gradually from startup.
>
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> report.
> https://bugs.launchpad.net/bugs/1759836
>
> Title:
>   systemd-udevd consumes 100% of CPU
>
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[Bug 1759836] Re: systemd-udevd consumes 100% of CPU

[Jesse McNichol]

Similar problem for me. Dell E6530, Ubuntu 18.04

Downgraded to 4.13 headers as suggested above, disabled bluetooth in
BIOS as suggested by others. Neither workaround helped. Computer still
producing excess heat and systemd-udevd climbs to nearly 100% CPU usage
gradually from startup.

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  systemd-udevd consumes 100% of CPU

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

[Marcel Schrijvers]

Interesting read. If they are adding Dell 'features' then maybe also my
built in webcam will one day work again as that also doesn't work.

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

[Rick Harris]

It's a known kernel bug that Dell bluetooth is broken in kernels >=4.14,
so sticking with the old kernel that works for now.

Kernel bluetooth bug causes bluez 97-hid2hci.rules udev rule to fail.
systemd-udevd has always consumed 100% whenever a udev rule fails (could be 
argued that's also a bug but at least you become immediately aware there's a 
problem).

Possibly no coincidence that the break was introduced at the same time
kernel tree commits were made to btusb.c wrt. Dell 'features' being
addded.

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

[Marcel Schrijvers]

Just upgraded from kernel 4.15.0-20-generic => 4.15.0-22-generic - still
the same problem

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

[Daniel van Vugt]

** Also affects: ubuntu-power-consumption
   Importance: Undecided
   Status: New

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

[Vivek Agrawal]

I also faced the same issue and thanks to the Lumar's comment, workaround 
mentioned in the link worked for me too:
https://dev.solus-project.com/T5224

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

[Lumar via ubuntu-bugs]

The bug is present on my system.
It was temporarily solved with workaround from 
https://dev.solus-project.com/T5224, but I don't use Bluetooth and so don't 
know if it is now working.

* Infos from uname
Linux 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:15:38 UTC 2018 i686 i686 
i686 GNU/Linux
Ubuntu 4.15.0-20.21-generic 4.15.17

* From dmidecode
System Information
Manufacturer: Dell Inc.
Product Name: Vostro 3700
Version: A10

Base Board Information
Manufacturer: Dell Inc.
Product Name: 07VWR8
Version: A10
Features:
Board is a hosting board
Board is replaceable
Type: Motherboard

OEM Strings
String 1: Dell System
String 2: 5[0003]
String 3: 13[PP41L]

BIOS Information
Vendor: Dell Inc.
Version: A10
Release Date: 10/25/2010
Address: 0xF
Runtime Size: 64 kB
ROM Size: 2048 kB
Characteristics:
MCA is supported
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
ESCD support is available
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Targeted content distribution is supported
BIOS Revision: 1.254
Firmware Revision: 1.254

* From /sys/kernel/debug/usb/devices
T:  Bus=01 Lev=03 Prnt=03 Port=02 Cnt=03 Dev#=  7 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=413c ProdID=8160 Rev= 1.73
S:  Manufacturer=Dell Computer Corp
S:  Product=Dell Wireless 365 Bluetooth Module
C:* #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  32 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  32 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  64 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  64 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  64 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  64 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=84(I) Atr=02(Bulk) MxPS=  32 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS=  32 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=00 Driver=(none)

* From udevadm
UDEV  [947.284638] unbind   
/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb)
KERNEL[947.289860] bind 
/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb)
KERNEL[947.290052] unbind   
/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb)

* From journalctl
mag 18 17:07:42 upowerd[10489]: unhandled action 'bind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0
mag 18 17:07:42 systemd-udevd[323]: Process 'hid2hci --method=dell  
--devpath=/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0' 
failed with exit code 1.
mag 18 17:07:42 upowerd[10489]: unhandled action 'unbind' on 
/sys/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0

* From systemd-udevd
'hid2hci --method=dell 
--devpath=/devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0'(err)
 'error: switching device 
'/sys//devices/pci:00/:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0' 
failed.'

* From /proc/modules
btusb 40960 0 - Live 0xf8ae7000
btrtl 16384 1 btusb, Live 0xf8957000
btbcm 16384 1 btusb, Live 0xf88ea000
btintel 16384 1 btusb, 

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

[Daniel van Vugt]

** Changed in: bluez (Ubuntu)
   Status: Incomplete => Invalid

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

[Marcel Schrijvers]

Forget last time to add some details about the problem with the new
kernel 4.15.0-20-generic versus 4.13.0-39-generic.

Kernel 4.15.0-20-generic
dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 4214 RPM
CPU: +70.0°C 
SODIMM: +57.0°C 
Other: +54.0°C

acpitz-virtual-0
Adapter: Virtual device
temp1: +70.5°C (crit = +107.0°C)

coretemp-isa-
Adapter: ISA adapter
Core 0: +67.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +72.0°C (high = +105.0°C, crit = +105.0°C)

Kernel 4.13.0-39-generic
dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 2774 RPM
CPU: +40.0°C 
SODIMM: +44.0°C 
Other: +44.0°C

acpitz-virtual-0
Adapter: Virtual device
temp1: +40.5°C (crit = +107.0°C)

coretemp-isa-
Adapter: ISA adapter
Core 0: +41.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +43.0°C (high = +105.0°C, crit = +105.0°C)

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  systemd-udevd consumes 100% of CPU

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

[Kunwardeep Singh]

I am using Dell Inspiron 15R (N5010) and this bug affects my system as
described above. Waiting for the fix.

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

[ilia fata]

I have a Dell Inspiron N5010 laptop and this bug affected my system.
hope to fix the bug soon.

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

[QuentinHartman]

I noticed this problem because my wireles KB/Mouse combo became nearly
unusable after upgrading from 17.10 to 18.04. I'm seeing the high CPU
consumption as reported above and the dell HID messages as reported
above. Also, if I unplug the transceiver for my KB/Mouse it stops
working until I reboot.

My machine is a Dell XPS 15 9560. So, also a Dell, but a very new one.

Downgrading to kernel 4.13 has alleviated the symptoms.

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

[Wedge009]

Adding some information in case it's useful.

Old - but still useful - Intel Core 2 laptop with discrete Mobility
Radeon GPU. I had nvidia packages installed for development purposes
years ago, but don't really use them any more. After the upgrade from
17.10 to 18.04 (only performed 2018-05-12, several days after official
release), I noticed single-threaded 100% CPU usage from systemd-udevd,
with modprobe starting and exiting over and over again. I saw lots of
messages complaining about NVIDIA hardware not being found in dmesg
output. After uninstalling the nvidia packages and rebooting, the high
CPU usage seemed to go away.

So at least on my system, it seems there was a conflict between having
nvidia drivers present with no NVIDIA hardware available.

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  systemd-udevd consumes 100% of CPU

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

[ach619]

Please help this makes my laptop completely usless

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

[ach619]

Also have Dell Inspiron N5010 systemd-udevd taking up 100% of processor System 
is overheating
ran strace -fvvp pid and get this info repeating endlessly
epoll_wait(10, [{EPOLLIN, {u32=445921552, u64=94798964078864}}, {EPOLLIN, 
{u32=445707360, u64=94798963864672}}, {EPOLLIN, {u32=445832272, 
u64=94798963989584}}], 11, 0) = 3
clock_gettime(CLOCK_BOOTTIME, {tv_sec=2541, tv_nsec=278071571}) = 0
epoll_wait(10, [{EPOLLIN, {u32=445921552, u64=94798964078864}}, {EPOLLIN, 
{u32=445707360, u64=94798963864672}}, {EPOLLIN, {u32=445832272, 
u64=94798963989584}}], 11, 0) = 3
clock_gettime(CLOCK_BOOTTIME, {tv_sec=2541, tv_nsec=278167641}) = 0
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=0}], 
msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, 
cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=1790, uid=0, gid=0}}], 
msg_controllen=32, msg_flags=0}, MSG_DONTWAIT) = 0
recvmsg(7, {msg_namelen=0}, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily 
unavailable)
sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=1789, nl_groups=}, 
msg_namelen=12, 
msg_iov=[{iov_base="libudev\0\376\355\312\376(\0\0\0(\0\0\0\37\1\0\0\5w\305\345\261\2Ge"...,
 iov_len=40}, {iov_base="ACTION=bind\0DEVPATH=/devices/pci"..., iov_len=287}], 
msg_iovlen=2, msg_controllen=0, msg_flags=0}, 0) = 327
epoll_wait(10, [{EPOLLIN, {u32=445921552, u64=94798964078864}}, {EPOLLIN, 
{u32=445707360, u64=94798963864672}}, {EPOLLIN, {u32=445832272, 
u64=94798963989584}}], 11, 0) = 3
clock_gettime(CLOCK_BOOTTIME, {tv_sec=2541, tv_nsec=284128363}) = 0
recvmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=0x01}, 
msg_namelen=128->12, msg_iov=[{iov_base="unbind@/devices/pci:00/:"..., 
iov_len=8192}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, 
cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=0, uid=0, gid=0}}], 
msg_controllen=32, msg_flags=0}, 0) = 264
getrandom("\x5c\x05\xb7\x00\xc9\x0e\x92\x24\x64\x4b\x1d\xbe\x21\xad\x25\xab", 
16, GRND_NONBLOCK) = 16
getrandom("\xa2\x4a\x63\x92\x35\xf3\x63\x78\x5d\xec\x7b\x25\xfe\xe4\xfe\xd5", 
16, GRND_NONBLOCK) = 16
getrandom("\xed\xfb\x0a\x18\x24\xe4\x07\xdb\xc1\x9e\x4e\xfe\xf5\xcc\xb6\xb3", 
16, GRND_NONBLOCK) = 16
getrandom("\x98\x96\xbe\xbe\x06\x4b\xe3\x26\xe0\xeb\xb2\xc6\xcc\x17\x3c\x7f", 
16, GRND_NONBLOCK) = 16
getrandom("\x3a\x5a\x82\x79\xfb\xb7\x32\x02\x58\x05\xdb\x2a\x81\x7a\x16\x50", 
16, GRND_NONBLOCK) = 16
getrandom("\xb0\xde\x65\xbb\x40\x2e\x1c\x35\x11\xad\x32\x9c\x19\x18\xc7\x33", 
16, GRND_NONBLOCK) = 16


** Description changed:

  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@.service → 
/lib/systemd/system/user@.service.d/timeout.conf
-  
-  2 overridden configuration files found.
+  [EXTENDED]   /lib/systemd/system/rc-local.service → 
/lib/systemd/system/rc-local.service.d/debian.conf
+  [EXTENDED]   /lib/systemd/system/user@.service → 
/lib/systemd/system/user@.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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  systemd-udevd consumes 100% of CPU

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

[John Talbot]

Happening here on a Dell Latitude E5500

$ top
  PID USER  PR  NIVIRTRESSHR S  %CPU %MEM TIME+ COMMAND 
   
  380 root  20   0  110872  69188   3232 R  88.9  1.7   0:43.18 
systemd-udevd  
  392 root  20   0   45872   6488   5320 R  22.2  0.2   0:26.84 
systemd-udevd

$ udevadm monitor
KERNEL[161.787649] bind 
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)
KERNEL[161.789029] unbind   
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)
UDEV  [161.790050] unbind   
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)
KERNEL[161.799621] bind 
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)
KERNEL[161.801036] unbind   
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)
UDEV  [161.802407] bind 
/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb)

$ journalctl | grep -i udevd
May 09 07:25:31 Latitude-E5500-GB8FR4J systemd-udevd[367]: Process 'hid2hci 
--method=dell 
--devpath=/devices/pci:00/:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed 
with exit code 1.


Thanks
JT

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  systemd-udevd consumes 100% of CPU

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

[Marcel Schrijvers]

Same here, problem started after I upgraded from Ubuntu 17.10 -> 18.04 on my 
Dell Latitude E6500 laptop. 
In Ubuntu 18.04 I used 4.15.0-20-generic, now I use 4.13.0-39-generic and now 
temperatures are normal again.

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  systemd-udevd consumes 100% of CPU

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

[Juha Luoma]

Hit this problem after updated Ubuntu 17.10 -> 18.04 on my old Dell
Latitude E6400 laptop.

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  systemd-udevd consumes 100% of CPU

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

[Daniel van Vugt]

Is there reason to believe that bluez (the bluetoothd process) is
involved here? If the problem is low-level bluetooth then the correct
package to log that against is 'linux'.

** Changed in: bluez (Ubuntu)
   Status: New => Incomplete

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  systemd-udevd consumes 100% of CPU

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

[Andrea Bocci]

Also reported on Solus [https://dev.solus-project.com/T5224], Manjaro
[https://forum.manjaro.org/t/high-cpu-usage-on-kernel-4-14-and-4-15
-from-systemd-udevd-which-seems-to-be-the-synaptic-touchpad-
driver/35972] and Gentoo (on the Manjaro page).

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  systemd-udevd consumes 100% of CPU

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

[Andrea Bocci]

** Bug watch added: Linux Kernel Bug Tracker #199035
   https://bugzilla.kernel.org/show_bug.cgi?id=199035

** Also affects: kernel via
   https://bugzilla.kernel.org/show_bug.cgi?id=199035
   Importance: Unknown
   Status: Unknown

** Also affects: bluez via
   https://bugzilla.kernel.org/show_bug.cgi?id=199035
   Importance: Unknown
   Status: Unknown

** Also affects: bluez (Ubuntu)
   Importance: Undecided
   Status: New

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  systemd-udevd consumes 100% of CPU

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

[Gaétan QUENTIN]

i have:
 -  stopped systemd-udevd
 -  uninstalled nvidia-compute-utils-396
 - started systemd-udevd

it s ok now

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  systemd-udevd consumes 100% of CPU

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

[Gaétan QUENTIN]

and cannot disable nvidia-persistenced.service:

systemctl disable   nvidia-persistenced.service

 -> wait a lng time
and still here

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  systemd-udevd consumes 100% of CPU

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[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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  systemd-udevd consumes 100% of CPU

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

[ephill...@gmail.com]

I use Dell Inspiron 1545 with Intel® Core™2 Duo CPU P8700 @ 2.53GHz × 2 
If I use kernel shipped with 18.04, I get 100% cpu  problem.
If I user kernel 4.14 I get Kernel Panic on system boot up.

After change Kernel to 4.13.x (shipped with ubuntu 17.10) I get my
system back.

Know all is working and CPU is normal.

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  systemd-udevd consumes 100% of CPU

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

[JR]

I do see those messages - it's an older Dell Latitude.
I also tried booting with the kernel shipped with 17.10 and the problem doesn't 
exist there.

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