GDM loading issue

The problem:
After boot->login (if done fast) some Gnome GUI functions are not working, for example:

  • I can’t change brightness using GUI controls(and keyboard buttons)
  • Restart / Power off GUI controls don’t work (nothing happens after confirmation)
  • Network controls are inactive
  • Any apps that require pkexec are unable to work properly - password prompt does not appear (but I can see in system monitor that app is actually running as well as calling pkexec processes)

The problem appears ONLY if I login fast. If I wait some time on login screen before actually confirming password - all is ok.
Additionally su and sudo work well in terminal no matter what.
Issue reproduced only while using gdm3 + SysVinit. Systemd is ok, but I have other issues there so need to use SysVinit.

How I reproduce the problem:

  1. If after reboot I login(type password and submit) too fast (matter of secods) using Gnome Wayland - Gnome GUI loses root access as described above
  2. If after following reboots I login too fast using Gnome Xorg - it will not log me in (soft-lock without errors) until I select Gnome wayland - and then it’s ok

So the main question is: Are there any ways to resolve the described issue and what actually is it caused by?

Some system info:

HP EliteBook 655 15.6 inch G10
Kernel: 6.6.11-amd64 [6.6.11-1~mx23ahs] arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
Desktop: GNOME v: 43.9 wm: gnome-shell dm: GDM3 v: 43.0 Distro: MX-23.3_ahs_x64 Libretto July 31 2023 base: Debian GNU/Linux 12 (bookworm)

Thank you for your attention and help.

The problems you mentioned are a big part of why GNOME switched to systemd and stopped supporting sysvinit years ago.

That’s a bit unexpected for me.
Then next my post will be about problems on systemd.