During boot up the system will hang and then a timeout will allow it continue. This happens twice.
The first one occurs right after the network interfaces are renamed. Example:
[ 5.160480] e1000e 0000:02:00.0 enp2s0f0: renamed from eth0
[ 121.345255] raid6: sse2x1 gen() 4431 MB/s
The second one is from /scripts/init-bottom/lvm where 'udevadm --settle' is run.
# we cannot properly synthesize LVM LV change events with udevadm trigger, so
# if we use LVM, we need to let it finish; otherwise we get missing LV symlinks
# (LP #1185394)
if [ -x /sbin/vgchange ]; then
udevadm settle --timeout=121 || true
fi
$ lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
$ apt-cache policy udev us.archive. ubuntu. com/ubuntu artful-updates/main amd64 Packages security. ubuntu. com/ubuntu artful- security/ main amd64 Packages dpkg/status us.archive. ubuntu. com/ubuntu artful/main amd64 Packages
udev:
Installed: 234-2ubuntu12.1
Candidate: 234-2ubuntu12.1
Version table:
*** 234-2ubuntu12.1 500
500 http://
500 http://
100 /var/lib/
234-2ubuntu12 500
500 http://
Expected:
Ubuntu 17.10 booting up as fast as Ubuntu 16.04
What happened instead:
During boot up the system will hang and then a timeout will allow it continue. This happens twice.
The first one occurs right after the network interfaces are renamed. Example:
[ 5.160480] e1000e 0000:02:00.0 enp2s0f0: renamed from eth0
[ 121.345255] raid6: sse2x1 gen() 4431 MB/s
The second one is from /scripts/ init-bottom/ lvm where 'udevadm --settle' is run.
# we cannot properly synthesize LVM LV change events with udevadm trigger, so
# if we use LVM, we need to let it finish; otherwise we get missing LV symlinks
# (LP #1185394)
if [ -x /sbin/vgchange ]; then
udevadm settle --timeout=121 || true
fi
Reproducing:
Where $vg is some existing volume group name:
lvcreate -n pvtest -L 20m $vg
pvcreate /dev/$vg/pvtest
reboot
ProblemType: Bug ature: Ubuntu 4.13.0- 16.19-generic 4.13.4 256color DIR=<set> /vmlinuz- 4.13.0- 16-generic root=/dev/ mapper/ vg1-root ro verbose asset.tag: To Be Filled By O.E.M. asset.tag: Asset-1234567890 version: Chassis Version MegatrendsInc. :bvr3029: bd07/05/ 2012:svnSystemm anufacturer: pnSystemProduct Name:pvrSystemV ersion: rvnASUSTeKCompu terINC. :rnM4A89GTD- PRO/USB3: rvrRev1. xx:cvnChassisMa nufacture: ct3:cvrChassisV ersion: version: System Version
DistroRelease: Ubuntu 17.10
Package: udev 234-2ubuntu12.1
ProcVersionSign
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 10 18:29:33 2017
InstallationDate: Installed on 2017-11-05 (5 days ago)
InstallationMedia: Ubuntu-Server 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/05/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3029
dmi.board.
dmi.board.name: M4A89GTD-PRO/USB3
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: System Product Name
dmi.product.
dmi.sys.vendor: System manufacturer