Public bug reported:
# lsb_release -rd
Description: Ubuntu 22.04 LTS
Release: 22.04
# uname -a
Linux fpgrpi 5.15.0-1008-raspi #8-Ubuntu SMP PREEMPT Thu May 19 11:58:51 UTC
2022 aarch64 aarch64 aarch64 GNU/Linux
Problem summary:
----------------
System is a Raspberry Pi 4 Model B Rev 1.4.
When you remove the 'quiet' and 'splash' options in file
/boot/firmware/cmdline.txt in order to see "live" the kernel and systemd
messages generated during boot these messages are not shown from the
start of the boot process. It remains a blank screen until boot process
reached a late stage (maybe the gpu driver init but I'm not sure).
It works with previous kernels 5.13 from Impish (it show all messages
from the boot start) but is broken in kernels 5.15 from jammy.
What was expected:
------------------
As in kernel 5.13 the boot will show 4 raspberries in the top of the screen and
the kernel and systemd messages generated will be shown from the start of the
boot process.
How to reproduce:
-----------------
Remove the 'quiet' option in file /boot/firmware/cmdline.txt in order to see
"live" the kernel and systemd messages generated during boot. With kernel 5.13
these messages are shown from the boot process start but with kernel 5.15 the
screen remains blank until a late boot stage.
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1976147
Title:
[Kernel 5.15] System messages (kernel and systemd) are not shown
during boot until it reach a late stage
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