High power consumption in idle / unable to turn GPU off

NVIDIA Open GPU Kernel Modules Version

515.76

Does this happen with the proprietary driver (of the same version) as well?

Yes

Operating System and Version

Fedora 36

Kernel Release

5.19.12-200.fc36.x86_64

Hardware: GPU

NVIDIA GeForce RTX 3050 Ti Laptop GPU

Describe the bug

If Nvidia drivers are loaded powertop reports ~14W usage on idle while nvidia-smi shows "No running processes found"

If I blacklist nouveau, nvidia and remove the device using udev rules powertop reports ~7W usage on idle.

Note: From time to time it can boot with Nvidia drivers loaded and show ~7W usage on idle, this is rare but possible. If I wake up the GPU using nvidia-smi it will not go back to low power consumption again.

To Reproduce

Install nvidia drivers using this official fedora guide:
https://rpmfusion.org/Howto/NVIDIA

Bug Incidence

Always

nvidia-bug-report.log.gz

N/A

More Info

cat /proc/driver/nvidia/gpus/0000\:01\:00.0/power output:

Runtime D3 status:          Enabled (fine-grained)
Video Memory:               Active

GPU Hardware Support:
 Video Memory Self Refresh: Supported
 Video Memory Off:          Supported

Power Limits:
 Default:                   40000 milliwatts
 GPU Boost:                 40000 milliwatts

Reproduce the idle state on Fedora 36 with the NVIDIA driver, then compare powertop, nvidia-smi, and /proc/driver/nvidia/gpus/0000:01:00.0/power before and after waking the GPU. No source file or test is identified, so trace the relevant power-management entry points and use the reported low-power state as the completion criterion.