Yes, after noticing that my NumLock was gone at the LightDM login screen from my Cinnamon DE, I also saw that /etc/lightdm/slick-greeter.conf is now a .pacsave file.
Sadly, that’s just a temporary fix, as it will surely become a .pacsave again in a next update, because of this change:
[cinnamon] remove slick-greeter.conf
As said on this page, you have now to
use schema override in manjaro-cinnamon-settings instead
That is in this file /usr/share/glib-2.0/schemas/10_slick-greeter-cinnamon.gschema.override which is identical in content to a standard old slick-greeter.conf (so, minus any customizations).
So, just add your customizations in this file (in my case, it was only activate-numlock=true) and then you will have to run sudo glib-compile-schemas /usr/share/glib-2.0/schemas to validate the changes.
After a reboot, my NumLock was back again at the login screen!
Source of this solution here: [Testing Update] 2026-07-04 - Kernels, Firefox, Thunderbird, KDE Gear, COSMIC, QEmu
To the mods: as we are now going from editing a simple text file with an editor to compiling GSettings XML schema files with a program that IMHO is not the most well known (never heard of or had to use it before, personally), it would be great to add a few words about this in the Known issues and solutions post. I know it’s a wiki and it can be edited, but I have no clue how…
Thanks in advance!