It first appeared when I upgraded ubuntu studio to 18.04 udevd started to use all available cpu. now I'm running ubuntu desktop from a usb key and it's still the same
udevadm monitor returns: KERNEL[2512.539491] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) UDEV [2512.540201] bind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.566574] bind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.566866] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) UDEV [2512.567499] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.594050] bind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.594310] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) UDEV [2512.596510] bind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.620736] bind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) KERNEL[2512.624606] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) UDEV [2512.634706] unbind /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0 (usb) ...
ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: udev 237-3ubuntu10.3 ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CasperVersion: 1.394 CustomUdevRuleFiles: 70-snap.core.rules Date: Mon Aug 20 18:54:48 2018 ExecutablePath: /lib/systemd/systemd-udevd LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Dell Inc. Vostro 3300 ProcEnviron: LANG=C.UTF-8 PATH=(custom, no user) ProcKernelCmdLine: file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/10/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A01 dmi.board.name: 07JC8T dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA01:bd02/10/2010:svnDellInc.:pnVostro3300:pvrNotSpecified:rvnDellInc.:rn07JC8T:rvrA00:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Vostro 3300 dmi.product.version: Not Specified dmi.sys.vendor: Dell Inc.
It first appeared when I upgraded ubuntu studio to 18.04
udevd started to use all available cpu.
now I'm running ubuntu desktop from a usb key and it's still the same
udevadm monitor returns: pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb) pci0000: 00/0000: 00:1a.0/ usb1/1- 1/1-1.1/ 1-1.1.2/ 1-1.1.2: 1.0 (usb)
KERNEL[2512.539491] unbind /devices/
UDEV [2512.540201] bind /devices/
KERNEL[2512.566574] bind /devices/
KERNEL[2512.566866] unbind /devices/
UDEV [2512.567499] unbind /devices/
KERNEL[2512.594050] bind /devices/
KERNEL[2512.594310] unbind /devices/
UDEV [2512.596510] bind /devices/
KERNEL[2512.620736] bind /devices/
KERNEL[2512.624606] unbind /devices/
UDEV [2512.634706] unbind /devices/
...
ProblemType: Bug ature: Ubuntu 4.15.0- 29.31-generic 4.15.18 iles: 70-snap.core.rules systemd- udevd preseed/ hostname. seed boot=casper initrd= /casper/ initrd. lz quiet splash --- maybe-ubiquity version: Not Specified :bvrA01: bd02/10/ 2010:svnDellInc .:pnVostro3300: pvrNotSpecified :rvnDellInc. :rn07JC8T: rvrA00: cvnDellInc. :ct8:cvrNotSpec ified: version: Not Specified
DistroRelease: Ubuntu 18.04
Package: udev 237-3ubuntu10.3
ProcVersionSign
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
CustomUdevRuleF
Date: Mon Aug 20 18:54:48 2018
ExecutablePath: /lib/systemd/
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Dell Inc. Vostro 3300
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
ProcKernelCmdLine: file=/cdrom/
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/10/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 07JC8T
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: Vostro 3300
dmi.product.
dmi.sys.vendor: Dell Inc.