After installing GDM-Settings, the GDM isn’t starting at boot. However, if i am switching with Ctrl+Alt+F2 and then with Ctrl+Alt+F1 - the GDM is showing up and i can login as usual.
if i switch to the LightDM, it works
systemctl disable gdm
pamac install lightdm-gtk-greeter
systemctl enable lightdm
then switch to the GDM and it has the prev. non-working state:
systemctl disable lightdm
systemctl enable gdm
● gdm.service - GNOME Display Manager
Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; preset: disabled)
Active: active (running) since Sat 2023-02-04 11:25:50 CET; 29min ago
Main PID: 746 (gdm)
Tasks: 3 (limit: 18770)
Memory: 9.4M
CPU: 194ms
CGroup: /system.slice/gdm.service
└─746 /usr/bin/gdm
Feb 04 11:25:51 cube gdm[746]: Gdm: Child process -900 was already dead.
Feb 04 11:25:51 cube gdm[746]: Gdm: GdmDisplay: Session never registered, failing
Feb 04 11:25:51 cube gdm[746]: Gdm: GdmLocalDisplayFactory: maximum number of X display failures reached: check X server log for errors
Feb 04 11:25:51 cube gdm[746]: Gdm: Child process -924 was already dead.
Feb 04 11:26:23 cube gdm-password][1590]: pam_systemd_home(gdm-password:auth): systemd-homed is not available: Unit dbus-org.freedesktop.home1.service not found.
Feb 04 11:26:24 cube gdm-password][1590]: gkr-pam: unable to locate daemon control file
Feb 04 11:26:24 cube gdm-password][1590]: gkr-pam: stashed password to try later in open session
Feb 04 11:26:24 cube gdm-password][1590]: pam_unix(gdm-password:session): session opened for user qp(uid=1000) by (uid=0)
Feb 04 11:26:25 cube gdm-password][1590]: gkr-pam: unlocked login keyring
Feb 04 11:26:29 cube gdm[746]: Gdm: Child process -1148 was already dead.
Any ideas? 
Thanks!