nvidia-drm failure when resuming from hibernation

[hujuice]

My issue is similar to many other issues found in various forums, but not identical.
Googling around, I find more confusion than clarifications.
Somebody in the Arch community apparently found solutions related to systemd services, but I use openrc.

My desktop works very smoothly, except a failure when I resume from hibernation.
Both screens shut down after the openrc output and all what I find is this error:

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nvidia-modeset: ERROR: GPU:0: Idling display engine timed out: 0x0000987d:0:0:417

Except this, the system is up, I can ssh and all the services are running.

Tweaking /etc/modprobe.d/nvidia.conf didn't help.
If I use nouveau everything works finely.

What I see is that if I manually remove nvidia-drm (after stopping display-manager)

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modprobe -r nvidia_drm

then I can hibernate and resume (and then manually load nvidia-drm and successfully restart the display manager).

Kernel is 6.6.7, nvidia drivers are 550.144.03 (same result with 550.142 and 565.77), card is GeForce GT 1030.

What's wrong with nvidia-drm?

Regards,
HUjuice