5090 mobile GPU is stuck on 95W TGP - is this a driver issue?

[Bill2462]

Hi!

I bought the Asus Strix SCAR 18 G835L laptop with a 5090 mobile for ML research and gaming, and unfortunately, the GPU is suck on the default TGP setting of 95W. So far, the driver seems operational, and PyTorch and other deep learning packages are working correctly. Still, the power issue is annoying because it removes almost half of the performance.

I verified on Windows 11 that the GPU can reach 175W, so it seems to be a driver issue, not a hardware / BIOS problem. Or at least some functionality is broken/missing on Linux but not on Windows.

My system is as follows:

• OS: Manjaro Linux
• Kernel: Linux 6.14.6-2-MANJARO #1 SMP PREEMPT_DYNAMIC Wed, 14 May 2025 14:56:34 +0000 x86_64 GNU/Linux
• Hardware: GPU 0: NVIDIA GeForce RTX 5090 Laptop GPU (UUID: GPU-8ea15d32-2110-b651-5439-4c790e7e5e3a)
• driver: 570.144-12 (from linux614-nvidia-open package)

The problem is that when I try to change the limit, the nvidia-smi says it is unsupported.

So sudo nvidia-smi -pl 175 outputs: Changing the power management limit is not supported for GPU: 00000000:02:00.0

Does anyone have a clue what can be going wrong here?

I attached the bug report file if it can be of any help: nvidia-bug-report.log.gz

I would be grateful for any suggestions. I tried installing a proprietary driver, but it is not working at all. The GPU is not detected by the nvidia-smi tool.