Issue where viewport flickers when running simulation with LiDAR

Omniverse Isaac Sim
1

I am observing that the viewport in Omniverse flickers when I run simulations that have LiDAR.
You can see the flickering effect in the animation below. It begins when I press play in the simulator:

isaac-sim-from-launcher

The above animation was generated by running the environment set up by a standalone application using a command that was recommended in a related issue here:

$ ./python.sh standalone_examples/api/omni.isaac.debug_draw/rtx_lidar.py --config Hesai_XT32_SD10

Similar to that post, I am also seeing a flood of the following informational message that could be related:

[Info][omni.sensors.nv.lidar.lidar_core.plugin] MotionBVH for lidar model not enabled. This will result in an incorrect point cloud without motion effects!

Please note that apart from the flickering effect, the point cloud seems to be fine and the simulation is running smoothly in real time.

My environment uses RTX GPUs and has the following specs:

Display Driver: Intel’s i915
Windowing System: Wayland
Vulkan: Enabled
Linux Kernel Version: 6.10
NVIDIA Driver Version: 560.35.03
CUDA Version: 12.6

The NVIDIA driver has been unlinked from Xorg or Wayland to dedicate the GPUs to compute and rendering purposes. This means that the Intel graphics driver handles the display (nvidia-smi shows no GPU-bound processes by default).

Could someone please provide help resolving the flickering issue and possibly address the MotionBVH logs?

2

I’ve got a couple of things to do but I will run the example you’ve set. I managed to resolve my issue (sort of)

Give me a few hours and I’ll try the standalone you mentioned

3

That would be very helpful, thank you.

4

I am facing the same issue. Did you get any solution yet?

5

image
image1920Ă—804 129 KB

I ran the standalone example with no issues

win 10
RTX 3090
64 GB RAM
i9
Isaac 4.2
latest gaming drivers

It actually didnt cause me my previous issue so i need to look into this and why its not causing the same issues as the script editor…

I’ll give my post a bump later with a video showing my issues.

6

you solve the problem? I followed [html](you solve the problem? I followed RTX Lidar Action Graph Overview — Omniverse IsaacSim latest documentation and the viewport flickers as well.) and the viewport flickers as well.

7

If you are using multiple GPUs this seems to be the cause. Check the other flicker viewport post

1 Like
8

“I’m using two A6000 GPUs. I need to turn off multi-GPU mode?”

9

Seems like it, I would imagine this will be patched in the future

See here for the fix for now