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System information
OS: Debian 13
Kernel:
Working: 6.12.73+deb13+1-amd64
Broken: 6.12.74+deb13+1-amd64
GPU: NVIDIA GeForce GTX 1660 SUPER (Turing)
Driver: 550.163.01-2
Display server: X11
Boot parameter: nvidia-drm.modeset=1
Description

System becomes unresponsive (full freeze requiring hard reset) shortly after
boot (~1–5 minutes) when using kernel 6.12.74.

The issue does not occur on kernel 6.12.73 with the same driver and
configuration.

Logs (relevant excerpts)
modprobe: ERROR: could not insert 'nvidia_current_drm': Invalid argument
Failed to insert module 'nvidia_drm'

nvidia-drm: Invalid argument

WARNING at nv_drm_revoke_modeset_permission
nvidia-drm-drv.c:1220
Steps to reproduce
Install NVIDIA driver 550.163.01 on Debian 13
Boot into kernel 6.12.74
Log into X11 session
Within ~5 minutes, system freezes completely
Expected behavior

System should remain stable and NVIDIA DRM module should load correctly.

Actual behavior
nvidia_drm fails to initialize
System becomes unstable
Full system freeze occurs
Regression
Works on kernel 6.12.73
Broken on kernel 6.12.74
Additional notes
Clean reinstall of NVIDIA drivers performed
DKMS rebuilt successfully
No leftover modules or configuration issues
Problem reproducible consistently