Slow reported boot in VM

[Benjamin Drung]

systemd-analyze reports a slow boot in a virtual machine. Steps to reproduce:

1. Install ubuntu-23.04-desktop-amd64.iso in a VM (8 cores, 4 GB memory). Select all default but unselect requiring to enter the password to login
2. Reboot and install all updates
3. Reboot the virtual machine. The machine will take several seconds to boot and login
4. Open a terminal and enter systemd-analyze

Expected total reported boot time on my hardware: around 3.5 seconds

But I got:

$ systemd-analyze
Bootup is not yet finished (org.freedesktop.systemd1.Manager.FinishTimestampMonotonic=0).
Please try again later.
Hint: Use 'systemctl list-jobs' to see active jobs
$ systemctl list-jobs
JOB UNIT TYPE STATE
170 systemd-update-utmp-runlevel.service start waiting
156 system-getty.slice start waiting
1 graphical.target start waiting
104 plymouth-quit-wait.service start running
2 multi-user.target start waiting
40 setvtrgb.service start waiting

6 jobs listed.
$ sleep 20 && systemd-analyze
Startup finished in 1.603s (kernel) + 21.500s (userspace) = 23.103s
graphical.target reached after 21.436s in userspace.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: systemd 252.5-2ubuntu3.1
ProcVersionSignature: Ubuntu 6.2.0-33.33-generic 6.2.16
Uname: Linux 6.2.0-33-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 19 12:47:49 2023
InstallationDate: Installed on 2023-09-19 (0 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
 /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 5000M
 /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
     |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M
MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-33-generic root=UUID=45c33f38-bb4c-4a7c-8abc-9359992c8cb5 ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.release: 0.0
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.16.0-debian-1.16.0-5
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-q35-7.2
dmi.modalias: dmi:bvnSeaBIOS:bvr1.16.0-debian-1.16.0-5:bd04/01/2014:br0.0:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-7.2:cvnQEMU:ct1:cvrpc-q35-7.2:sku:
dmi.product.name: Standard PC (Q35 + ICH9, 2009)
dmi.product.version: pc-q35-7.2
dmi.sys.vendor: QEMU