Jetson AGX Thor GPU Not Detected - nvidia-smi "No devices found" - JetPack 7.1 L4T 38.4.0

Robotics & Edge Computing Jetson Systems Jetson Thor
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Hello NVIDIA Community,

I purchased a Jetson AGX Thor Developer Kit from Amazon and spent 4 days (64+ hours) flashing it. System boots fine on JetPack 7.1 (L4T 38.4.0), but GPU is NOT working.

Problem: GPU not detected. Cannot use CUDA or TensorRT.

Symptoms:

  • nvidia-smi: “No devices were found”
  • torch.cuda.is_available(): False
  • cuInit returns error 999
  • nvpmodel: “NVPM WARN: power mode is not set!”

What WORKS:

  • /dev/nvidia0, /dev/nvidia1, /dev/nvidiactl exist
  • Driver version: 580.65.06
  • SSH, VNC, camera, audio all work
  • System boots and runs fine

System Info:

  • JetPack: 7.1
  • L4T: 38.4.0
  • Kernel: 6.8.12-tegra
  • Ubuntu: 24.04.3 LTS

Questions for community:

  1. Is this a known issue with L4T 38.4.0?
  2. For those with WORKING Thor GPU - what JetPack version and flash method did you use?
  3. Any fix without complete reflash? (Reflashing took 4 days)
  4. Should I downgrade to JetPack 7.0?

Considering Amazon return if no fix available. Any help appreciated!

Thank you,
Sam

2

UPDATE - Diagnostic Results:

I ran diagnostics and found the exact errors in dmesg:

RmInitAdapter: Cannot initialize GSP firmware RM
kgspWaitForRmInitDone failed @ kernel_gsp_gh100.c:980
RmInitAdapter failed! (0x62:0x40:1993)
rm_init_adapter failed, device minor number 0

Driver Info:

  • Version: NVIDIA UNIX Open Kernel Module 580.65.06
  • Modules loaded: nvidia, nvidia_uvm, nvidia_drm, nvidia_modeset
  • nvpmodel was showing: “WARN - power mode is not set!”

What I tried:

  • Set nvpmodel: sudo nvpmodel -m 0
  • Rebooted
  • nvidia-smi still shows “No devices were found”

However, tegrastats DOES see the GPU:

Power:

  • GPU: 0mW (idle) ← GPU hardware exists!
  • CPU/SOC: 4.3W
  • System: 18W total

Conclusion:

Question:
That thread mentions the --openrm flag fixed it during flash. Is there any way to apply this fix WITHOUT complete reflash? Reflashing took me 4 days (64+ hours) due to USB connection issues.

Or do I need to wait for JetPack 7.2 with a fix?

Thank you,
Sam

4

Hi

Sorry that you will need to flash the device with --openrm.
Since Thor requires SBSA driver to work.

Thanks.