[Testing - Trixie] sddm hangs on regular boot, but launches fine if i boot into recovery mode and exit.

[sev7ves]

So reading logs through journalctl i've figured out that my issue has to do with sddm

on normal boot it gets to launching X and then hangs, i can't do anything and need to do a hard shut down.

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Jan 20 10:07:31 debian systemd[1]: Started sddm.service - Simple Desktop Display Manager.
Jan 20 10:07:31 debian sddm[1009]: Initializing...
Jan 20 10:07:31 debian sddm[1009]: Starting...
Jan 20 10:07:31 debian sddm[1009]: Logind interface found
Jan 20 10:07:31 debian sddm[1009]: Adding new display...
Jan 20 10:07:31 debian sddm[1009]: Loaded empty theme configuration
Jan 20 10:07:31 debian sddm[1009]: Xauthority path: "/run/sddm/xauth_ZSftNP"
Jan 20 10:07:31 debian sddm[1009]: Using VT 2
Jan 20 10:07:31 debian sddm[1009]: Display server starting...
Jan 20 10:07:31 debian sddm[1009]: Writing cookie to "/run/sddm/xauth_ZSftNP"
Jan 20 10:07:31 debian sddm[1009]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_ZSftNP -noreset -displayfd 16

while exiting recovery mode gets me

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Jan 20 10:11:45 debian systemd[1]: Started sddm.service - Simple Desktop Display Manager.
Jan 20 10:11:45 debian sddm[1066]: Initializing...
Jan 20 10:11:45 debian sddm[1066]: Starting...
Jan 20 10:11:45 debian sddm[1066]: Logind interface found
Jan 20 10:11:45 debian sddm[1066]: Adding new display...
Jan 20 10:11:45 debian sddm[1066]: Loaded empty theme configuration
Jan 20 10:11:45 debian sddm[1066]: Xauthority path: "/run/sddm/xauth_aizuji"
Jan 20 10:11:45 debian sddm[1066]: Using VT 2
Jan 20 10:11:45 debian sddm[1066]: Display server starting...
Jan 20 10:11:45 debian sddm[1066]: Writing cookie to "/run/sddm/xauth_aizuji"
Jan 20 10:11:45 debian sddm[1066]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_aizuji -noreset -displayfd 16
Jan 20 10:11:47 debian sddm[1066]: Setting default cursor
Jan 20 10:11:47 debian sddm[1066]: Running display setup script  "/usr/share/sddm/scripts/Xsetup"
Jan 20 10:11:47 debian sddm[1066]: Display server started.
Jan 20 10:11:47 debian sddm[1066]: Socket server starting...
Jan 20 10:11:47 debian sddm[1066]: Socket server started.
Jan 20 10:11:47 debian sddm[1066]: Loading theme configuration from "/usr/share/sddm/themes/debian-theme/theme.conf"
Jan 20 10:11:47 debian sddm[1066]: Greeter starting...
Jan 20 10:11:47 debian sddm-helper[1074]: [PAM] Starting...
Jan 20 10:11:47 debian sddm-helper[1074]: [PAM] Authenticating...
Jan 20 10:11:47 debian sddm-helper[1074]: [PAM] returning.
Jan 20 10:11:47 debian sddm-helper[1074]: pam_unix(sddm-greeter:session): session opened for user sddm(uid=110) by (uid=0)

though on older boots without this issue

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Jan 09 05:33:47 debian systemd[1]: systemd-rfkill.service: Deactivated successfully.

runs after running X.

I tried looking for solutions and saw a solution of delaying sddm if it runs before GPU services are loaded, but this isn't an issue for me.

system details:

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╭─[~]─[sev@debian]─[0]─[664]
╰─[:)] % inxi -b 
System:
  Host: debian Kernel: 6.5.0-5-amd64 arch: x86_64 bits: 64 Desktop: KDE Plasma
    v: 5.27.10 Distro: Debian GNU/Linux trixie/sid
Machine:
  Type: Desktop System: Gigabyte product: N/A v: N/A
    serial: <superuser required>
  Mobo: Gigabyte model: H110M-S2PV DDR3-CF v: x.x
    serial: <superuser required> UEFI-[Legacy]: American Megatrends v: F4
    date: 10/30/2015
CPU:
  Info: dual core Intel Core i3-6100 [MT MCP] speed (MHz): avg: 800
    min/max: 800/3700
Graphics:
  Device-1: NVIDIA GM206 [GeForce GTX 950] driver: nvidia v: 525.147.05
  Display: x11 server: X.Org v: 21.1.10 with: Xwayland v: 23.2.3 driver: X:
    loaded: nvidia unloaded: fbdev,modesetting,nouveau,vesa gpu: nvidia
    resolution: 1920x1080~60Hz
  API: OpenGL v: 4.6.0 vendor: nvidia v: 525.147.05 renderer: NVIDIA
    GeForce GTX 950/PCIe/SSE2
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    driver: r8169
  Device-2: TP-Link Archer T4U ver.3 driver: rtl88x2bu type: USB
Drives:
  Local Storage: total: 1.13 TiB used: 856.44 GiB (74.1%)
Info:
  Processes: 262 Uptime: 57m Memory: total: 12 GiB note: est.
  available: 11.51 GiB used: 4.48 GiB (38.9%) Shell: Zsh inxi: 3.3.31

[sev7ves]

i did some more digging in logs and i found that normally i get SIGRTMIN+21 from plymouthd on a normal boot

[sev7ves]

i tried to uninstall sddm, to see if it was the root of the issue but the problem still occurs. also

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Jan 26 20:58:11 debian kernel: start_addr=(0x20000), end_addr=(0x40000), buffer_size=(0x20000), smp_number_max=(16384)

is continuously printed to the console when i launch in recovery mode

[estatistics]

all display managers that i tried were lagging almost 2-3 minutes
namely gdm3, lightdm, sddm, xdm on new sdd