Changing screen/desktop settings simultaneously with login screen settings?

I recently installed Bazzite on my main PC to test how it could be run as a general desktop OS. I was using Windows for as long as I was alive at this point, but recently started to get into the Linux world.

I have a 2 monitor setup. Right off the bat I noticed two things on the login screen:

  1. Monitors were mixed up - it seems it recognized my right monitor as “left” or something, thus I get my mouse and focus on the right monitor, which I don’t want, and if i want to get to the left monitor, i have to move my mouse to the right border of the right monitor
  2. Mouse too fast

OK! This seems trivial to fix in the desktop parameters etc. BUT! The settings doesn’t seem to be applied to the login screen!

Well, this is stupid. I started searching what the heck do I have to do for my login screen to get my monitor setup and mouse settings to not drive me nuts each boot! I later found out that I have to find specific parameters for login screen (SDDM) and here click a specific button to apply my Plasma settings!

This stuff is super unintuitive for a new user and it has to change some way or another to not be super annoying for those who are trying to get off Windows.
So it seems that there is some “lore” about KDE, Wayland, multiple monitors… so that’s the reason for the stupidity I witness, maybe.

What could be done, in order from the most desireable:

  1. Automatically apply settings to the login screen. The “intuitive” stuff.
  2. If syncing settings right away is not possible, maybe do it some way asynchroniously. Maybe ask user on logout or something, if they want to have their desktop changes applied to the login screen, have option “Not to ask again”
  3. If the current way of things is already established, and automatic sync of parameters will throw a chunk of people off, this stuff could be opt-in, hopefully somewhere during setup.
  4. If any of the above is not possible for some reason, instruct user in some clear way that the desktop and the login screen setup are the two different entities which doesn’t share their settings and for the login setup you need to go here and here press here etc. Preferably after the first login or something.

This is basically a suggestion post. Is this the right place to do suggestions for maintainers, or maybe it’s better be posted somewhere else? Cheers

Sddm is pretty much it’s own entity. It has no real connection to kde. So that äpply plasma settings"need to be done in the real environment by the user.

So you only see the 4th option here for some UX improvement? No automatic interaction between the app components here, like right off the bat not possible?
I mean, if I want a PC OS more or less working after clean install, with doing as less tedious stuff as possible, at the very least I wouldn’t want to deal with seemingly trivial (from the majority Windows userbase point at least) UX problems.
Is Bazzite a kind of thing I should be able (maybe in the future) to just set up and use? Or is it still that “Linux” type mindset thing where to get some typical stuff working i have to get to the bottom of some random forum thread?
I get that the SDDM is it’s own thing, but I see the OS as if not the monolith, but at the very least an organism where things communicate between each other to deliver the most enjoyable experience possible. These things, login screen and the general desktop experience, should be interconnected at the very least concerning basic things like mouse and desktop setup.
Does “kde and sddm are different” mean in Linux world “we can’t do anything here to make the UX better”?

Yeah, this is dumb. The best you can do is submit a bug report to the KDE project. U-Blue devs don’t work on this stuff.

KDE is working on their own login manager that should be way more integrated to the desktop.

But for now, we can’t really do anything related to the plasma settings not applying to SDDM.