CUDA error: Launch failed in cuCtxSynchronize(), line 1679 #60806

New Issue

Loïc DAUTRY · 2019-01-23T22:49:04+01:00

Loïc DAUTRY commented

2019-01-23 22:49:04 +01:00

System Information
Operating system: Windows 10 64b pro
Graphics card: Nvidia GTX 970

Blender Version
Broken (all three of them) :
2.79b
2.79.6 65b25df801 (2018-10-25)
2.8 dc3b5024be (2019-01-23)
2.8 1d908bffdd of January 24, 01:37:26
2.79.6 d753726ce7 of January 24, 02:19:28

Short description of error

I have one blender scene:

Bath1.blend

If I start rendering with GPU, the GPU tiles renders blank and I end up with this error :

CUDA error: Launch failed in cuCtxSynchronize(), line 1679

I tried with CPU + GPU (only CPU renders, GPU tiles keep rendering blank tiles and I got the error at the end of rendering), tried different tile sizes and samplings as well. Also tried on other computers (one with GTX 1080, one with GTX 980ti).

**System Information** Operating system: Windows 10 64b pro Graphics card: Nvidia GTX 970 **Blender Version** Broken (all three of them) : 2.79b 2.79.6 65b25df8018 (2018-10-25) 2.8 dc3b5024be1a (2019-01-23) 2.8 1d908bffddb4 of January 24, 01:37:26 2.79.6 d753726ce712 of January 24, 02:19:28 **Short description of error** I have one blender scene: [Bath1.blend](https://archive.blender.org/developer/F6382669/Bath1.blend) If I start rendering with GPU, the GPU tiles renders blank and I end up with this error : `CUDA error: Launch failed in cuCtxSynchronize(), line 1679` I tried with CPU + GPU (only CPU renders, GPU tiles keep rendering blank tiles and I got the error at the end of rendering), tried different tile sizes and samplings as well. Also tried on other computers (one with GTX 1080, one with GTX 980ti).

Loïc DAUTRY commented

2019-01-23 22:49:04 +01:00

Added subscriber: @L0Lock

Steffen Dünner commented

2019-01-23 22:54:16 +01:00

Added subscriber: @SteffenD

Marco commented

2019-01-24 01:23:53 +01:00

Added subscriber: @nacioss

Marco commented

2019-01-24 01:23:53 +01:00

The solution to this problem is here:
http://artificialflight.org/blog/2013/cycles-crash-cuda-tdr-error/

The solution to this problem is here: http://artificialflight.org/blog/2013/cycles-crash-cuda-tdr-error/

Loïc DAUTRY commented

2019-01-24 10:50:05 +01:00

No it isn't, nor even nearly the same problem.

Loïc DAUTRY commented

2019-01-24 14:25:40 +01:00

Just tried again with version 2.8 1d908bffdd of January 24, 01:37:26, and version 2.79.6 d753726ce7 of January 24, 02:19:28. Not better.

Just tried again with version 2.8 1d908bffddb4 of January 24, 01:37:26, and version 2.79.6 d753726ce712 of January 24, 02:19:28. Not better.

Brecht Van Lommel self-assigned this 2019-01-24 14:34:05 +01:00

blender-admin commented

2019-01-24 15:15:57 +01:00

This issue was referenced by blender/cycles@3f5cbac544

This issue was referenced by blender/cycles@3f5cbac544cfc5420e81fb1234aef0a8e3147079

blender-admin commented

2019-01-24 15:15:57 +01:00

This issue was referenced by 6260b3c15e

This issue was referenced by 6260b3c15e5afd0a38c97a16d47665833f69a79f

Brecht Van Lommel commented

2019-01-24 19:01:00 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2019-01-24 19:01:00 +01:00

Loïc DAUTRY commented

2019-01-25 09:59:54 +01:00

Thanks for the fast fix!
Tried today's build (January 25, 01:04:42 - 4b8b7c821d ).
There are no errors anymore, but still quite an issue: when rendering with GPU + CPU, there's a tile missing.

Right now I'm on an Intel i7-980X (12 threads) with Nvidia GTX 660.

Rendering with GPU only looks fine :

But as I enable both CPU and GPU as compute devices, there are only 12 render tiles at the same time (I guess the 12 are from the CPU) :

(Note that the screen shot uses huge tile size and no rendered tiles because otherwise, it was hard to see. But I did my tests with 16px², 32px², 128px², and always waited for the render to be completed.)

Thanks for the fast fix! Tried today's build (January 25, 01:04:42 - 4b8b7c821d46 ). There are no errors anymore, but still quite an issue: when rendering with GPU + CPU, there's a tile missing. Right now I'm on an Intel i7-980X (12 threads) with Nvidia GTX 660. Rendering with GPU only looks fine : ![image.png](https://archive.blender.org/developer/F6398203/image.png) But as I enable both CPU and GPU as compute devices, there are only 12 render tiles at the same time (I guess the 12 are from the CPU) : ![image.png](https://archive.blender.org/developer/F6398214/image.png) (Note that the screen shot uses huge tile size and no rendered tiles because otherwise, it was hard to see. But I did my tests with 16px², 32px², 128px², and always waited for the render to be completed.)

Brecht Van Lommel commented

2019-01-25 11:35:26 +01:00

With CPU + GPU rendering, there is one CPU core dedicated to the GPU.

Loïc DAUTRY commented

2019-01-25 11:54:08 +01:00

Oh ok I didn't noticed.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

CUDA error: Launch failed in cuCtxSynchronize(), line 1679 #60806