[Question] Stuck in headless mode

[Elycyx]

I encountered an issue when using the data generation example in imitation learning. When running it in headless mode, the process gets stuck at a certain step without any further output in the terminal.

Additionally, when I try to train a BC policy using the following command: ./isaaclab.sh -p scripts/imitation_learning/robomimic/train.py --task Isaac-Stack-Cube-Franka-IK-Rel-v0 --algo bc --dataset ./datasets/generated_dataset.hdf5
It also gets stuck, seemingly due to headless mode. I am certain that I successfully trained the BC policy using the same process a few weeks ago, but I’m not sure why headless mode is causing issues this time.

[INFO] Using python from: /home/***/miniforge3/envs/isaaclab/bin/python                                                
[INFO][AppLauncher]: Loading experience file: /mnt/sda1/Isaac/IsaacLab/apps/isaaclab.python.headless.kit
Loading user config located at: '/mnt/sda1/Isaac/ov/pkg/isaac-sim-4.5.0/kit/data/Kit/Isaac-Sim/4.5/user.config.json'
[Info] [carb] Logging to file: /mnt/sda1/Isaac/ov/pkg/isaac-sim-4.5.0/kit/logs/Kit/Isaac-Sim/4.5/kit_20250222_165907.log
2025-02-22 08:59:07 [0ms] [Warning] [omni.kit.app.plugin] No crash reporter present, dumps uploading isn't available.
2025-02-22 08:59:08 [619ms] [Warning] [gpu.foundation.plugin] Skipping unsupported non-NVIDIA GPU: Intel(R) Graphics (RPL-S)
2025-02-22 08:59:08 [619ms] [Warning] [gpu.foundation.plugin] Skipping unsupported non-NVIDIA GPU: Intel(R) Graphics (RPL-S)

|---------------------------------------------------------------------------------------------|
| Driver Version: 560.35.03     | Graphics API: Vulkan
|=============================================================================================|
| GPU | Name                             | Active | LDA | GPU Memory | Vendor-ID | LUID       |
|     |                                  |        |     |            | Device-ID | UUID       |
|     |                                  |        |     |            | Bus-ID    |            |
|---------------------------------------------------------------------------------------------|
| 0   | NVIDIA GeForce RTX 4070 Laptop.. | Yes: 0 |     | 8188    MB | 10de      | 0          |
|     |                                  |        |     |            | 2860      | 6356a0df.. |
|     |                                  |        |     |            | 1         |            |
|---------------------------------------------------------------------------------------------|
| 1   | Intel(R) Graphics (RPL-S)        |        |     | 23848   MB | 8086      | 0          |
|     |                                  |        |     |            | a788      | 868088a7.. |
|     |                                  |        |     |            | 0         |            |
|=============================================================================================|
| OS: 22.04.5 LTS (Jammy Jellyfish) ubuntu, Version: 22.04.5, Kernel: 6.8.0-52-generic
| XServer Vendor: The X.Org Foundation, XServer Version: 12101004 (1.21.1.4)
| Processor: Intel(R) Core(TM) i7-14700HX
| Cores: 20 | Logical Cores: 28
|---------------------------------------------------------------------------------------------|
| Total Memory (MB): 31798 | Free Memory: 23799
| Total Page/Swap (MB): 2047 | Free Page/Swap: 2047
|---------------------------------------------------------------------------------------------|
2025-02-22 08:59:08 [885ms] [Warning] [gpu.foundation.plugin] IOMMU is enabled.
2025-02-22 08:59:08 [885ms] [Warning] [gpu.foundation.plugin] Detected IOMMU is enabled. Running CUDA peer-to-peer bandwidth and latency validation.
Unidirectional P2P=Enabled Bandwidth (P2P Writes) Matrix (GB/s)
   D\D     0 
     0 175.86 
P2P=Enabled Latency (P2P Writes) Matrix (us)
   GPU     0 
     0   1.76 

   CPU     0 
     0   1.35 
2025-02-22 08:59:08 [1,024ms] [Warning] [omni.usd_config.extension] Enable omni.materialx.libs extension to use MaterialX
2025-02-22 08:59:10 [2,242ms] [Warning] [omni.datastore] OmniHub is inaccessible
2025-02-22 08:59:10 [2,439ms] [Warning] [omni.isaac.dynamic_control] omni.isaac.dynamic_control is deprecated as of Isaac Sim 4.5. No action is needed from end-users.

[RandomOakForest]

Thank you for posting this. We will take a look. Could you fill in our Bug Report template in the issues? Or simply replace "[Question]" in the title with "[Bug Report]" and edit your text to fill in the following:

If you are submitting a bug report, please fill in the following details and use the tag [bug].

### Describe the bug

A clear and concise description of what the bug is.

### Steps to reproduce

Please try to provide a minimal example to reproduce the bug. Error messages and stack traces are also helpful.

<!-- Please post terminal logs, minimal example to reproduce, or command to run under three backticks (```) to allow code formatting.

****Paste your error here****

For more information on this, check: https://www.markdownguide.org/extended-syntax/#fenced-code-blocks

-->

### System Info

Describe the characteristic of your environment:

<!-- Please complete the following description. -->
- Commit: [e.g. 8f3b9ca]
- Isaac Sim Version: [e.g. 2022.2.0, this can be obtained by `cat ${ISAACSIM_PATH}/VERSION`]
- OS: [e.g. Ubuntu 20.04]
- GPU: [e.g. RTX 2060 Super]
- CUDA: [e.g. 11.4]
- GPU Driver: [e.g. 470.82.01, this can be seen by using `nvidia-smi` command.]

### Additional context

Add any other context about the problem here.

### Checklist

- [ ] I have checked that there is no similar issue in the repo (**required**)
- [ ] I have checked that the issue is not in running Isaac Sim itself and is related to the repo

### Acceptance Criteria

Add the criteria for which this task is considered **done**. If not known at issue creation time, you can add this once the issue is assigned.

- [ ] Criteria 1
- [ ] Criteria 2

Thank you.