Plymouth boot messages

[mvysny]

I've experimented a lot but can't seem to get Ubuntu to show Plymouth boot splash or boot messages - instead, the UTM logo is shown for ~20 seconds and then the Ubuntu login screen shows. It would be good to see the messages, to see that the VM is booting up and is not frozen. Have anyone managed to do that? I've reconfigured /etc/default/grub and removed quiet and splash, I've also installed plymouth-theme-ubuntu-text but no luck so far.

[mvysny]

Modifying /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="noquiet console=tty12 systemd.log_target=kmsg systemd.log_level=debug" shows a bit of kernel log and a bunch of initial systemd userspace boot messages, but after 3 seconds the stream of messages stop, UTM sits there for about 10 seconds and then switches to the login screen. I'm still missing the [ OK ] messages, such as:

[ OK ] Started CUPS Scheduler.
<more yidi yada>
[ OK ] Started Run anacron jobs.
[ OK ] Started ACPI event daemon.
[ OK ] Started Set the CPU Frequency Scaling governor.
       Starting Hold until boot process finishes up... any system changes.pp link was shut down.

I guess those come from systemd in case of Ubuntu 24.10; no luck configuring systemd to show those messages so far.

I've also removed Plymouth via sudo apt autoremove --purge "plymouth*" to see those kernel messages on tty12.

EDIT: According to https://superuser.com/questions/1081851/see-the-systemd-boot-logs the boot messages are logged to tty1. Apparently UTM is showing tty12 at boot time instead, for some reason. I wonder what is the configuration for that?

[mvysny]

Wohoo, finally solved this! Use GRUB_CMDLINE_LINUX_DEFAULT="noquiet console=tty1 systemd.log_target=kmsg - that will make UTM show the tty1 on boot. If not, press ⌥← or ⌥→ to toggle between tty1, tty2, ..., tty12 until you arrive to tty1 and see the boot messages.