Blander crash without ray shadows Nvidia GTX 950M CUDA #71145

New Issue

CHET · 2019-10-28T02:56:21+01:00

CHET commented

2019-10-28 02:56:21 +01:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 950M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 411.63

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-10-25 10:47, hash: 7137d89daa
Worked: (optional)

Short description of error
When turn off ray shadow visiblity render becomes slow and the blender crashes.
2019-10-28_03-53-23.mp4

I tested again on GTX 750 Ti and 2.92.0 Alpha, branch: master, commit date: 2020-11-24 16:32, hash: e922dd7d8a. If I turn shadows off first, then switch to rendered view, it gives bad render:

It disappears when you do something. Typical when there's something wrong in Cycles. I need to restart Blender to be able to render again.
When I turn rendered view first, then turn shadows off, it sometimes crashes.
This is all Cuda. Optix renders nothing at all. I presume Optix doesn't do volumes yet.
Also noticed that deleting sun lamp and leaving only area lamps fixed the issue.

Steps to reproduce
облака в стекле.blend

Open file
Disable shadow ray invisibility on object
Switch to rendered shading

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 950M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 411.63 **Blender Version** Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-10-25 10:47, hash: `7137d89daa` Worked: (optional) **Short description of error** When turn off ray shadow visiblity render becomes slow and the blender crashes. [2019-10-28_03-53-23.mp4](https://archive.blender.org/developer/F7863861/2019-10-28_03-53-23.mp4) ------------ I tested again on GTX 750 Ti and 2.92.0 Alpha, branch: master, commit date: 2020-11-24 16:32, hash: `e922dd7d8a`. If I turn shadows off first, then switch to rendered view, it gives bad render: ![image.png](https://archive.blender.org/developer/F9375941/image.png) It disappears when you do something. Typical when there's something wrong in Cycles. I need to restart Blender to be able to render again. When I turn rendered view first, then turn shadows off, it sometimes crashes. This is all Cuda. Optix renders nothing at all. I presume Optix doesn't do volumes yet. Also noticed that deleting sun lamp and leaving only area lamps fixed the issue. **Steps to reproduce** [облака в стекле.blend](https://archive.blender.org/developer/F7866083/облака_в_стекле.blend) - Open file - Disable shadow ray invisibility on object - Switch to rendered shading

CHET commented

2019-10-28 02:56:21 +01:00

Added subscriber: @cheteron

Marcin Twarowski commented

2019-10-28 09:27:12 +01:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2019-10-28 09:27:12 +01:00

Hi. Could you upload a test file? There must be something about that particular scene that causes crash.

CHET commented

2019-10-28 18:12:57 +01:00

облака в стекле.blend

[облака в стекле.blend](https://archive.blender.org/developer/F7866083/облака_в_стекле.blend)

Marcin Twarowski commented

2019-10-28 18:51:28 +01:00

I confirm. It crashed.

Windows-10-10.0.18362 64 Bits
GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.97

I confirm. It crashed. Windows-10-10.0.18362 64 Bits GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.97

Germano Cavalcante commented

2019-10-30 13:53:00 +01:00

Added subscribers: @Sergey, @mano-wii

Sergey Sharybin was assigned by Germano Cavalcante

2019-10-30 13:53:00 +01:00

Germano Cavalcante commented

2019-10-30 13:53:00 +01:00

I can't reproduce the crash rendering with CPU.
The GPU (OpenCL) goes black but does not crash (unrelated).

@Sergey, can you reproduce the problem?

System Information
Operating system: Windows-10-10.0.18941 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12028.2

I can't reproduce the crash rendering with CPU. The GPU (OpenCL) goes black but does not crash (unrelated). @Sergey, can you reproduce the problem? **System Information** Operating system: Windows-10-10.0.18941 64 Bits Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12028.2

Sergey Sharybin removed their assignment 2019-10-30 16:59:11 +01:00

Sergey Sharybin commented

2019-10-30 16:59:11 +01:00

The fact that rendering becomes slower is somewhat expected. This is because shadow rays which are cast for objects inside the volume are never leaving the volume, making it so Cycles need to integrate volume for many more points.

The crash i am unable to reproduce.
Is there any clues in the system console?

OpenCL issue is better be reported separately, so Jeoen can look into details.

The fact that rendering becomes slower is somewhat expected. This is because shadow rays which are cast for objects inside the volume are never leaving the volume, making it so Cycles need to integrate volume for many more points. The crash i am unable to reproduce. Is there any clues in the system console? OpenCL issue is better be reported separately, so Jeoen can look into details.

Marcin Twarowski commented

2019-10-31 18:57:14 +01:00

blender_debug_output.txt
Here's a debug_output if it helps. It says:

CUDA error: Launch failed in cuCtxSynchronize(), line 1800

and

CUDA error: Launch failed in cuCtxSynchronize(), line 2274

[blender_debug_output.txt](https://archive.blender.org/developer/F7881228/blender_debug_output.txt) Here's a debug_output if it helps. It says: ``` CUDA error: Launch failed in cuCtxSynchronize(), line 1800 ``` and ``` CUDA error: Launch failed in cuCtxSynchronize(), line 2274 ```

Sergey Sharybin commented

2019-11-01 10:19:08 +01:00

This is most likely same as the described in the manual:

https://docs.blender.org/manual/en/latest/render/cycles/gpu_rendering.html#cuda-error-unknown-error-in-cuctxsynchronize

Happens when one tries to do a lot of work on GPU which is also used for display.
On a newer GPUs with compute preemption this is something we are dealing with, but i don't think this is possible on pre-Pascal cards.

So question is: by "blender crashes" do you mean blender completely closes unexpectedly or is it just rendering aborts, while blender stays in an operational state?

This is most likely same as the described in the manual: ``` https://docs.blender.org/manual/en/latest/render/cycles/gpu_rendering.html#cuda-error-unknown-error-in-cuctxsynchronize ``` Happens when one tries to do a lot of work on GPU which is also used for display. On a newer GPUs with compute preemption this is something we are dealing with, but i don't think this is possible on pre-Pascal cards. So question is: by "blender crashes" do you mean blender completely closes unexpectedly or is it just rendering aborts, while blender stays in an operational state?

Marcin Twarowski commented

2019-11-01 11:18:32 +01:00

Closes completely without a warning.

Richard Antalik changed title from ~~Blander crash without ray shadows~~ to Blander crash without ray shadows Nvidia GTX 950M CUDA

2020-11-25 17:30:16 +01:00

Richard Antalik commented

2020-11-25 17:31:05 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-11-25 17:31:05 +01:00

@cheteron, @MarcinTwarowski I am updating old reports so they are more searchable, and I want to ask if this is still issue for you, since a lot of time has passed, it is possible this has been resolved.

Marcin Twarowski commented

2020-11-26 01:00:39 +01:00

I tested again on GTX 750 Ti and 2.92.0 Alpha, branch: master, commit date: 2020-11-24 16:32, hash: e922dd7d8a. If I turn shadows off first, then switch to rendered view, it gives bad render:

It disappears when you do something. Typical when there's something wrong in Cycles. I need to restart Blender to be able to render again.
When I turn rendered view first, then turn shadows off, it sometimes crashes.
This is all Cuda. Optix renders nothing at all. I presume Optix doesn't do volumes yet.
Also noticed that deleting sun lamp and leaving only area lamps fixed the issue.

I tested again on GTX 750 Ti and 2.92.0 Alpha, branch: master, commit date: 2020-11-24 16:32, hash: `e922dd7d8a`. If I turn shadows off first, then switch to rendered view, it gives bad render: ![image.png](https://archive.blender.org/developer/F9375941/image.png) It disappears when you do something. Typical when there's something wrong in Cycles. I need to restart Blender to be able to render again. When I turn rendered view first, then turn shadows off, it sometimes crashes. This is all Cuda. Optix renders nothing at all. I presume Optix doesn't do volumes yet. Also noticed that deleting sun lamp and leaving only area lamps fixed the issue.

Richard Antalik commented

2020-11-26 17:16:21 +01:00

Thanks for update, I will update description with new info.

Raimund Klink commented

2022-07-27 13:01:27 +02:00

Added subscriber: @Raimund58

Raimund Klink commented

2022-07-27 13:01:27 +02:00

Can this task please be revisited? At least for me, it seems to work without issues. Win 11, Blender 3.2.1, GTX 1080, latest driver.
Two things that I noticed:
First, Optix does render the kernels just need a long time to be compiled. That is not visible in the scene because the Overlays are turned off.
Second, without the Shadow Visibility, it renders slower, but no other issues.

Can this task please be revisited? At least for me, it seems to work without issues. Win 11, Blender 3.2.1, GTX 1080, latest driver. Two things that I noticed: First, Optix does render the kernels just need a long time to be compiled. That is not visible in the scene because the Overlays are turned off. Second, without the Shadow Visibility, it renders slower, but no other issues.

Philipp Oeser removed the

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Blander crash without ray shadows Nvidia GTX 950M CUDA #71145