Going through the logs, heres some potentially interesting bits

```
сен 25 02:04:36 Alex-PC sddm-greeter-qt6[1185]: file:///usr/share/sddm/themes/breeze/Main.qml:232:17 Parameter "username" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.

сен 25 02:04:36 Alex-PC (systemd)[1262]: pam_warn(systemd-user:setcred): function=[pam_sm_setcred] flags=0x8002 service=[systemd-user] terminal=[/dev/tty1] user=[liberty] ruser=[<unknown>] rhost=[<unknown>]
сен 25 02:04:36 Alex-PC (systemd)[1262]: pam_unix(systemd-user:session): session opened for user liberty(uid=1000) by liberty(uid=0)
сен 25 02:04:36 Alex-PC systemd-logind[1027]: New session '3' of user 'liberty' with class 'manager' and type 'unspecified'.
сен 25 02:04:36 Alex-PC systemd[1262]: Queued start job for default target Main User Target.
сен 25 02:04:36 Alex-PC sddm-helper-start-wayland[1180]: wayland greeter finished 0 QProcess::NormalExit
сен 25 02:04:36 Alex-PC sddm-helper-start-wayland[1180]: quitting helper-start-wayland
сен 25 02:04:36 Alex-PC sddm-helper-start-wayland[1180]: Stopping... "kwin_wayland"

сен 25 02:05:09 Alex-PC kded6[1537]: QDBusObjectPath: invalid path "/modules/kded_plasma-welcome"
сен 25 02:05:09 Alex-PC kded6[1537]: kf.dbusaddons: The kded module name "kded_plasma-welcome" is invalid!
сен 25 02:05:09 Alex-PC kded6[1537]: QDBusObjectPath: invalid path "/modules/wpad-detector"
сен 25 02:05:09 Alex-PC kded6[1537]: kf.dbusaddons: The kded module name "wpad-detector" is invalid!
сен 25 02:05:09 Alex-PC kded6[1537]: org.kde.colorcorrectlocationupdater: Geolocator stopped
сен 25 02:05:09 Alex-PC kded6[1537]: QDBusObjectPath: invalid path "/modules/oom-notifier"
сен 25 02:05:09 Alex-PC kded6[1537]: kf.dbusaddons: The kded module name "oom-notifier" is invalid!
сен 25 02:05:09 Alex-PC kded6[1537]: QDBusObjectPath: invalid path "/modules/plasma-session-shortcuts"
сен 25 02:05:09 Alex-PC kded6[1537]: kf.dbusaddons: The kded module name "plasma-session-shortcuts" is invalid!
сен 25 02:05:09 Alex-PC DiscoverNotifier[1732]: couldn't load "/usr/lib/qt6/plugins/discover-notifier/DiscoverPackageKitNotifier.so" because "Невозможно загрузить библиотеку /usr/lib/qt6/plugins/discover-notifier/DiscoverPackageKitNotifier.so: libpackagekitqt6.so.1: невозможно открыть разделяемый объектный файл: Нет такого файла или каталога"

сен 25 02:06:17 Alex-PC kwin_wayland[1433]: kwin_wayland_drm: Atomic modeset test failed! Отказано в доступе
сен 25 02:06:17 Alex-PC kwin_wayland[1433]: kwin_core: Applying output configuration failed!
сен 25 02:06:17 Alex-PC kwin_wayland[1433]: kwin_wayland_drm: Atomic modeset test failed! Отказано в доступе
сен 25 02:06:17 Alex-PC kwin_wayland[1433]: kwin_core: Applying output configuration failed!

сен 25 02:06:20 Alex-PC sddm[1159]: Error from greeter session: "Process crashed"
сен 25 02:06:20 Alex-PC sddm[1159]: Auth: sddm-helper (--socket /tmp/sddm-auth-ea9de159-0f5b-496c-89fd-1cc9e08b0039 --id 4 --start /usr/bin/sddm-greeter-qt6 --socket /tmp/sddm--wEGOXV --theme /usr/share/sddm/themes/breeze --user sddm --display-server kwin_wayland --drm --no-lockscreen --no-global-shortcuts --locale1 --greeter) crashed (exit code 1)
сен 25 02:06:20 Alex-PC sddm[1159]: Error from greeter session: "Process crashed"
сен 25 02:06:20 Alex-PC sddm[1159]: Auth: sddm-helper exited with 1
сен 25 02:06:20 Alex-PC sddm[1159]: Greeter stopped. SDDM::Auth::HELPER_AUTH_ERROR
```

(In reply to Akseli Lahtinen from comment #1)
> Going through the logs, heres some potentially interesting bits
And what should I do about it?

Yeah, it looks like SDDM is crashing. However SDDM isn't a KDE project; please report this https://github.com/sddm/sddm/issues.

In the relatively near future, we're going to be moving to an in-house fork of SDDM, so bug reports like this will be able to stay on KDE infrastructure. But for now, they've gotta be reported to SDDM.

(In reply to Nate Graham from comment #3)
> Yeah, it looks like SDDM is crashing. However SDDM isn't a KDE project;
> please report this https://github.com/sddm/sddm/issues.
> 
> In the relatively near future, we're going to be moving to an in-house fork
> of SDDM, so bug reports like this will be able to stay on KDE
> infrastructure. But for now, they've gotta be reported to SDDM.

Thank you. Is there any way to try it?

It lives here: https://invent.kde.org/plasma/plasma-login-manager/

See the warning in the README file, though. If you want to try it, you'll be in for an adventure. :)

(In reply to Nate Graham from comment #5)
> It lives here: https://invent.kde.org/plasma/plasma-login-manager/
> 
> See the warning in the README file, though. If you want to try it, you'll be
> in for an adventure. :)

I love adventures. The main thing is that nothing is deleted from the disks :)

(In reply to Nate Graham from comment #5)
> It lives here: https://invent.kde.org/plasma/plasma-login-manager/
> 
> See the warning in the README file, though. If you want to try it, you'll be
> in for an adventure. :)

Tell me, please. The Plasma Login Manager repository says that it was created in 2023, but the first commit was Jan 18, 2013. How can this be?

I'd recommend asking these kinds of development-related questions in a more suitable venue, such as the plasma-devel Matrix room. See https://community.kde.org/Get_Involved/development#Where_to_find_the_development_team