LiDAR in Isaac Sim 4.2 hurt my eyes

Omniverse Isaac Sim
1

Hello,

I am trying running Lidar ROS standalone example.

with Isaac Sim 4.1, the simulation is fine
with Isaac Sim 4.2, it likes watching a video with flicker effect
with my large scene and hence low FPS (<20 FPS), with the 4.2 version, when I press play I got a black screen.
I do not know the relation between the flickering frequency and FPS. However, my assumption is based on the result from running standalone script

Bellow is my computer spec
Ubuntu 20 - contrained
ROS Noetic
2 RTX A6000 GPU
128 GB RAM

Thank you for your help,

3

New Update:

  • I test on another computer which uses Intel i7 not Intel Xeon and no flicker effects occurs.
  • The number of objects does not affect flicker effect occurrence.
  • Both of the computers using driver 550.
  • I am using ROS ext and I can see output data in RViz
4

I am experiencing the same issue. The entire screen flickers.
Below are my system details:

Hardware Configuration

  • GPU: NVIDIA RTX A6000 ×2
  • CUDA Version: 12.2
  • Driver Version: 535.183.06
  • VRAM: 48GB GDDR6 (each GPU)

Software Configuration

  • OS: Ubuntu 22.04
  • Python: 3.10.13
  • Isaac Sim Version: 4.2.0.2
  • Display Server: Xorg

Reproducibility Details

  • With Isaac Sim 4.1.0.0, the issue does not occur.
  • The issue is not present when using an RTX 3090 GPU.

If anyone has encountered this issue or knows a workaround, I would greatly appreciate your advice.

5

@hslktestmail and @326TKD have you encountered the flickering issue while following any documentation? Could you share a video of it?

6

I face the same issue while trying to run any of the ros2 navigation Isaac examples in Isaac Sim 4.2. This didn’t happen before updating it to 4.2.

The steps followed are:

  1. File > New.
  2. Then go to Isaac Examples > ROS2 > Navigation > carter navigation.
  3. Click on Play.

Then the camera perspective starts to flicker. The rest of the navigation in Rviz seems to run properly.

8

Please refer to the discussion in Isaac SIM 4.2.0 version, RTX Lidar Sensor has a significant bug that prevents it from functioning properly.

10

@VickNV

I’ve been running Isaac Sim in stand-alone mode using the Python API, and I’ve encountered a flickering issue that seems identical to the one discussed in the linked thread. I’ve attached a video demonstrating the problem.

For reference, I tested this with two A6000 GPUs and also with two RTX 6000 Ada GPUs. In both setups, the same flickering issue occurred. And the flickering stopped when I disabled multi-GPU support.

1 Like
11

I think you need to use only one GPU, until this is patched. I was reading about this in a previous thread, give it a try