Failed to create CUDA context unknown error #88968

New Issue

Rob Betz · 2021-06-08T19:43:11+02:00

Rob Betz commented

2021-06-08 19:43:11 +02:00

System Information
Operating system: Windows 10
Graphics card: RTX 2070 Super

Blender Version
Broken: 2.93.0
Worked: 2.93.0

Changed settings on a project so that my GPU was checked under CUDA. Render times were cut by a factor of 4. No issues on multiple renders. No settings changed, saved project as renamed file. Now it won't render with GPU checked under CUDA at all. Does this regardless of NR settings.

Exact steps for others to reproduce the error
Occurs anytime I try to render with my GPU checked under CUDA.

Drivers are all up to date; this worked perfectly several renders in a row then just stopped working.

I have also rebooted my machine. No change.

**System Information** Operating system: Windows 10 Graphics card: RTX 2070 Super **Blender Version** Broken: 2.93.0 Worked: 2.93.0 Changed settings on a project so that my GPU was checked under CUDA. Render times were cut by a factor of 4. No issues on multiple renders. No settings changed, saved project as renamed file. Now it won't render with GPU checked under CUDA at all. Does this regardless of NR settings. **Exact steps for others to reproduce the error** Occurs anytime I try to render with my GPU checked under CUDA. Drivers are all up to date; this worked perfectly several renders in a row then just stopped working. I have also rebooted my machine. No change.

Rob Betz commented

2021-06-08 19:43:11 +02:00

Added subscriber: @Rob-Betz

Chau commented

2021-11-05 08:47:20 +01:00

Added subscriber: @ChauHo

Chau commented

2021-11-05 08:47:20 +01:00

I get similar error with Google Colaboratory and Blender 2.93.5:

Error: Failed to create CUDA context (Unknown error)
Invalid value in cuCtxDestroy(cuContext) (device_cuda_impl.cpp:252)

System Information: Google Colaboratory (Linux)
• GPU: Telsa K80
• CPU: Intel Xeon CPU @ 2.30GHz

Blender version
• Blender 2.93.5 (hash a791bdabd0 built 2021-10-06 06:26:10)

Exact steps
• run Blender with command line (use any Blender file):

 !sudo ./blender-2.93.5-linux-x64/blender -b $path -noaudio -P '/gdrive/MyDrive/GPU2.py' -E 'CYCLES' -o $renderFileName -s $startRender -e $endRender -a -— -—cycles-device CUDA

• values for command line:

 fileName = 'MT'
 path = '/gdrive/MyDrive/'+fileName+'.blend'
 renderFileName = '//'+fileName+'_####'
 startRender = '85'
 endRender = '100'

/* Source code for GPU2.py */
import bpy
bpy.data.scenes- [x].render.engine = "CYCLES"

Set the device_type

bpy.context.preferences.addons[

  "cycles"

].preferences.compute_device_type = "CUDA" # or "OPTIX"

Set the device and feature set

bpy.context.scene.cycles.device = "GPU"

get_devices() to let Blender detects GPU device

bpy.context.preferences.addons["cycles"].preferences.get_devices()
print(bpy.context.preferences.addons["cycles"].preferences.compute_device_type)
for d in bpy.context.preferences.addons["cycles"].preferences.devices:

  d["use"] = 1 # Using all devices, include GPU and CPU
  print(d["name"], d["use"])

I get similar error with Google Colaboratory and Blender 2.93.5: Error: Failed to create CUDA context (Unknown error) Invalid value in cuCtxDestroy(cuContext) (device_cuda_impl.cpp:252) System Information: Google Colaboratory (Linux) • GPU: Telsa K80 • CPU: Intel Xeon CPU @ 2.30GHz Blender version • Blender 2.93.5 (hash a791bdabd0b2 built 2021-10-06 06:26:10) Exact steps • run Blender with command line (use any Blender file): ``` !sudo ./blender-2.93.5-linux-x64/blender -b $path -noaudio -P '/gdrive/MyDrive/GPU2.py' -E 'CYCLES' -o $renderFileName -s $startRender -e $endRender -a -— -—cycles-device CUDA ``` • values for command line: ``` fileName = 'MT' path = '/gdrive/MyDrive/'+fileName+'.blend' renderFileName = '//'+fileName+'_####' startRender = '85' endRender = '100' ``` /* Source code for GPU2.py */ import bpy bpy.data.scenes- [x].render.engine = "CYCLES" # Set the device_type bpy.context.preferences.addons[ ``` "cycles" ``` ].preferences.compute_device_type = "CUDA" # or "OPTIX" # Set the device and feature set bpy.context.scene.cycles.device = "GPU" # get_devices() to let Blender detects GPU device bpy.context.preferences.addons["cycles"].preferences.get_devices() print(bpy.context.preferences.addons["cycles"].preferences.compute_device_type) for d in bpy.context.preferences.addons["cycles"].preferences.devices: ``` d["use"] = 1 # Using all devices, include GPU and CPU print(d["name"], d["use"])

Raimund Klink commented

2021-11-05 10:15:35 +01:00

Added subscriber: @Raimund58

Raimund Klink commented

2021-11-05 10:15:35 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Raimund Klink commented

2021-11-05 10:15:35 +01:00

@Rob-Betz Can you please test again with Blender 2.93.5/6 and Blender 3.0 and report back?
Please make sure your GPU drivers are up to date.

@Rob-Betz Can you please test again with Blender 2.93.5/6 and Blender 3.0 and report back? Please make sure your GPU drivers are up to date.

Raimund Klink commented

2021-11-05 10:21:10 +01:00

@ChauHo Your report is super chaotic. Please try to organise it better so we can understand, what exactly you are doing.
Maybe you can have a look at this script. It might help you to do the things you want.
https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb

@ChauHo Your report is super chaotic. Please try to organise it better so we can understand, what exactly you are doing. Maybe you can have a look at this script. It might help you to do the things you want. https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb

Chau commented

2021-11-05 12:06:58 +01:00

I use this simple ipynb file
blenderGoogleGPU_2_93_5c.ipynb.txt
and python script for choose gpu
GPU2.py
If remove -p gpu2.py in command line for run Blender in .ipynb file, Blender render use cpu and no error.

I use this simple ipynb file [blenderGoogleGPU_2_93_5c.ipynb.txt](https://archive.blender.org/developer/F11728978/blenderGoogleGPU_2_93_5c.ipynb.txt) and python script for choose gpu [GPU2.py](https://archive.blender.org/developer/F11729000/GPU2.py) If remove -p gpu2.py in command line for run Blender in .ipynb file, Blender render use cpu and no error.

Chau commented

2021-11-05 12:57:34 +01:00

This video show how fix this problem (I will try tomorrow, I use all GPU time of today):
How to Fix Google Colab and Blender CUDA Errors - Blender Tutorial
https://www.youtube.com/watch?v=hMCE6-ddTdY

This video show how fix this problem (I will try tomorrow, I use all GPU time of today): How to Fix Google Colab and Blender CUDA Errors - Blender Tutorial https://www.youtube.com/watch?v=hMCE6-ddTdY

Chau commented

2021-11-07 06:19:46 +01:00

Results:

library fix from video no help, I still have same error
Person create video tell I should not need
- P 'GPU2.py'
  in command line run Blender because have
- —cycles-device CUDA
  but Blender never use GPU if no have -P 'GPU2.py'. Blend file is from Blender 2.76b and can't set use GPU in Blender 2.76b because my old computer. I upload test .blend file. Don't open it, send it direct to Colaboratory and test there.
  MT.blend

Before ≈2 weeks ago, I can use GPU (I use Blender 2.93.5 but need -P 'GPU2.py'). Google change some thing.

Results: 1. library fix from video no help, I still have same error 2. Person create video tell I should not need - P 'GPU2.py' in command line run Blender because have - —cycles-device CUDA but Blender never use GPU if no have -P 'GPU2.py'. Blend file is from Blender 2.76b and can't set use GPU in Blender 2.76b because my old computer. I upload test .blend file. Don't open it, send it direct to Colaboratory and test there. [MT.blend](https://archive.blender.org/developer/F11756181/MT.blend) Before ≈2 weeks ago, I can use GPU (I use Blender 2.93.5 but need -P 'GPU2.py'). Google change some thing.

Raimund Klink commented

2021-11-07 09:23:07 +01:00

@ChauHo Google changed nothing. If you would take a look at my script and maybe run it you will note that everything works fine.
https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb

This works fine as well:
-- --cycles-device CUDA

@ChauHo Google changed nothing. If you would take a look at my script and maybe run it you will note that everything works fine. https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb This works fine as well: `-- --cycles-device CUDA`

Chau commented

2021-11-11 03:15:29 +01:00

You script work! Ya! But need install many things and still need Python script for set GPU before run Blender. ;)

Google like upgrade and change their sýstem often. Maybe no cause problem for your script. I render several month before problem happen. :) Two days ago Google Drive tell my browser too old and upgrade (can't upgrade because computer and OS too old). Now need use smart phone for upload and download file. :(

You script work! Ya! But need install many things and still need Python script for set GPU before run Blender. ;) Google like upgrade and change their sýstem often. Maybe no cause problem for your script. I render several month before problem happen. :) Two days ago Google Drive tell my browser too old and upgrade (can't upgrade because computer and OS too old). Now need use smart phone for upload and download file. :(

Raimund Klink commented

2021-11-11 09:59:42 +01:00

Can you not upgrade your OS? Why not? Ever tried Linux?

Chau commented

2021-11-12 09:59:51 +01:00

I use old Macintosh from year 2007. Great machine and use for make MacOS and iOS apps. When get enough money buy I think some thing like System76 Meerkat and use Linux Mint (small and easy move).

Alex commented

2021-12-09 10:49:22 +01:00

Added subscriber: @woojin86

Alex commented

2021-12-09 10:49:22 +01:00

In #88968#1249913, @Raimund58 wrote:
@ChauHo Google changed nothing. If you would take a look at my script and maybe run it you will note that everything works fine.
https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb

This works fine as well:
-- --cycles-device CUDA

Hi, i'll try to run script, but have error msg:

"Blender 3.0.0 (hash f1cca30557 built 2021-12-03 00:34:54)
Error: Cannot read file '/drive/MT.blend': No such file or directory

Blender quit"

Drive already mounted, and file is present.
What i do wrong?

> In #88968#1249913, @Raimund58 wrote: > @ChauHo Google changed nothing. If you would take a look at my script and maybe run it you will note that everything works fine. > https://colab.research.google.com/gist/Raimund58/88061f785ea2563d345914d196c15b87/blender_script_for_google_colab_using_the_gpu.ipynb > > This works fine as well: > `-- --cycles-device CUDA` Hi, i'll try to run script, but have error msg: "Blender 3.0.0 (hash f1cca3055776 built 2021-12-03 00:34:54) Error: Cannot read file '/drive/MT.blend': No such file or directory Blender quit" Drive already mounted, and file is present. What i do wrong?

Raimund Klink commented

2021-12-09 10:57:42 +01:00

@woojin86 Your Path is probably wrong.
Error: Cannot read file '/drive/MT.blend': No such file or directory
Please seek support somewhere else. This is a bug tracker for Blender development

@woojin86 Your Path is probably wrong. **Error: Cannot read file '/drive/MT.blend': No such file or directory** Please seek support somewhere else. This is a bug tracker for Blender development

Raimund Klink commented

2021-12-09 12:42:07 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Raimund Klink closed this issue

2021-12-09 12:42:07 +01:00

Raimund Klink commented

2021-12-09 12:42:07 +01:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

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Failed to create CUDA context unknown error #88968

Set the device_type

Set the device and feature set

get_devices() to let Blender detects GPU device