After upgrading directly to this update release, I only get the warning for those very old kernels 4.19, 5.4, 5.10
Will see if it can be fixed by reinstalling them simply.
Continuing the discussion from [Stable Update] 2024-05-18 - Linux-Firmware, PHP, Gitlab, Qt6:
The hooks look fine in /etc/mkinitcpio.conf now:
HOOKS=(base udev autodetect microcode modconf kms keyboard keymap consolefont block filesystems fsck)
Comparing to the warning in pacman.log:
[2024-05-29T22:44:45+0200] [ALPM-SCRIPTLET] WARNING: The 'plymouth-encrypt' and 'sd-plymouth' hooks are depreciated. You should replace them with 'encrypt' and 'plymouth' hooks in your 'mkinitcpio.conf'. The 'lxdm-plymouth.service', 'lightdm-plymouth.service' and 'sddm-plymouth.service' systemd service files are no longer recommended. You should enable 'lxdm.service', 'lightdm.service' or 'sddm.service' instead.
And there are no files in /etc/mkinitcpio.conf.d/