Blender 2.80 GUI disappears during Cycles render with two GPU #68634

New Issue

Rainer Osselmann · 2019-08-14T10:06:08+02:00

Rainer Osselmann commented

2019-08-14 10:06:08 +02:00

System Information
Operating system: Windows 10
Graphics card: NVIdia Quadro M4000 (2x)

Blender Version
Broken: 2.80 all Versions since i started tests - 2.79 Dayli Builds (i think it came with support of rendering GPU and CPU together)
Worked: 2.79b official

Short description of error
Rendering with Cycles and both GPU's activated stopped Blender GUI without a message

Exact steps for others to reproduce the error
Just render a Scene with some Objects - GUI will disappear during rendering or shortly after the rendering. Rendering same Scene without GUI works fine and fast.
20009007928.pdp.blend

**System Information** Operating system: Windows 10 Graphics card: NVIdia Quadro M4000 (2x) **Blender Version** Broken: 2.80 all Versions since i started tests - 2.79 Dayli Builds (i think it came with support of rendering GPU and CPU together) Worked: 2.79b official **Short description of error** Rendering with Cycles and both GPU's activated stopped Blender GUI without a message **Exact steps for others to reproduce the error** Just render a Scene with some Objects - GUI will disappear during rendering or shortly after the rendering. Rendering same Scene without GUI works fine and fast. [20009007928.pdp.blend](https://archive.blender.org/developer/F7664023/20009007928.pdp.blend)

Rainer Osselmann commented

2019-08-14 10:06:08 +02:00

Added subscriber: @RainerO

William Reynish commented

2019-08-14 10:47:19 +02:00

Added subscriber: @WilliamReynish

William Reynish commented

2019-08-14 10:47:19 +02:00

I somehow doubt that you mean Blender 1.8, which was released in year 2000, 19 years ago. Especially since it didn't include Cycles at all.

Rainer Osselmann commented

2019-08-14 10:52:54 +02:00

oppps sorry should be 2.89 :-(

Bastien Montagne changed title from ~~Blender 1.80 GUI disappears during Cycles render with two GPU~~ to Blender 2.80 GUI disappears during Cycles render with two GPU

2019-08-14 11:21:49 +02:00

Bastien Montagne commented

2019-08-14 11:24:25 +02:00

Added subscribers: @brecht, @mont29

Bastien Montagne commented

2019-08-14 11:24:25 +02:00

@brecht might know more here? Not sure we have that kind of config here to test it though...

In the mean time, please ensure that your drivers are fully up to date, and please try to start blender from a console with --debug-cycles option, and report here any error you should get.

@brecht might know more here? Not sure we have that kind of config here to test it though... In the mean time, please ensure that your drivers are fully up to date, and please try to start blender from a console with `--debug-cycles` option, and report here any error you should get.

Rainer Osselmann commented

2019-08-14 12:24:41 +02:00

Hi,

strange.. starting "blender --debug-cycles" Blender disappears again and the last i saw in the console window was "CUDA ERROR".
Then i used
"blender --debug-cycles --python-expr "import bpy; bpy.ops.wm.sysinfo(filepath=r'%temp%\blender\debug_logs\blender_system_info.txt')" > "%temp%\blender\debug_logs\blender_debug_output.txt" 2>&1 < %0 "
rendered withou an error...
I will do further testing, in the meantime her are the logs. blender_system_info_2GPU_OK.txt

blender_debug_output_2GPU_OK.txt

Hi, strange.. starting "blender --debug-cycles" Blender disappears again and the last i saw in the console window was "CUDA ERROR". Then i used "blender --debug-cycles --python-expr "import bpy; bpy.ops.wm.sysinfo(filepath=r'%temp%\blender\debug_logs\blender_system_info.txt')" > "%temp%\blender\debug_logs\blender_debug_output.txt" 2>&1 < %0 " rendered withou an error... I will do further testing, in the meantime her are the logs. [blender_system_info_2GPU_OK.txt](https://archive.blender.org/developer/F7664175/blender_system_info_2GPU_OK.txt) [blender_debug_output_2GPU_OK.txt](https://archive.blender.org/developer/F7664176/blender_debug_output_2GPU_OK.txt)

Rainer Osselmann commented

2019-08-14 13:00:43 +02:00

Ok, got it now - first rendering needed about 4 minutes (in debug mode, against ca. 40 seconds without) and completed,
then 2nd try with render write still finished with a cuda error - seems to be something like an timing issue - btw rendering in GUI with only one GPU aktivated works fine.

blender_debug_output.txt

Ok, got it now - first rendering needed about 4 minutes (in debug mode, against ca. 40 seconds without) and completed, then 2nd try with render write still finished with a cuda error - seems to be something like an timing issue - btw rendering in GUI with only one GPU aktivated works fine. [blender_debug_output.txt](https://archive.blender.org/developer/F7664221/blender_debug_output.txt)

Richard Antalik commented

2020-01-07 20:42:19 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-01-07 20:42:19 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Richard Antalik commented

2020-01-07 20:42:19 +01:00

@RainerO Is this still an issue with latest build? https://builder.blender.org/download/

Rainer Osselmann commented

2020-01-09 12:37:12 +01:00

Hi,

1st Test with V 2.8.2: Rendering with 2 GPU on an existing Blend file works – but after rendering in File Menu “Search Missing Files” Blender disappears.

Mit freundlichen Grüßen aus dem Allgäu

Rainer Osselmann

Hi, 1st Test with V 2.8.2: Rendering with 2 GPU on an existing Blend file works – but after rendering in File Menu “Search Missing Files” Blender disappears. Mit freundlichen Grüßen aus dem Allgäu Rainer Osselmann

Richard Antalik commented

2020-01-09 13:03:21 +01:00

In #68634#844832, @RainerO wrote:
Hi,

1st Test with V 2.8.2: Rendering with 2 GPU on an existing Blend file works – but after rendering in File Menu “Search Missing Files” Blender disappears.

Just to clarify, if I understood correctly:

You can render provided file with 2 GPU's
Then you click on File > Search Missing Files
Blender UI dissapears (it is still running in task manager)

Is that correct?

> In #68634#844832, @RainerO wrote: > Hi, > > 1st Test with V 2.8.2: Rendering with 2 GPU on an existing Blend file works – but after rendering in File Menu “Search Missing Files” Blender disappears. Just to clarify, if I understood correctly: - You can render provided file with 2 GPU's - Then you click on File > Search Missing Files - Blender UI dissapears (it is still running in task manager) Is that correct?

Rainer Osselmann commented

2020-01-09 13:31:35 +01:00

Not realy - Blender was not in Taskmanager any longer

Now i did a 2nd test - rendering "freezes" at 11 from 12 tiles,(in Render Window) but time goes on - clicking "X" in Renderwindow also kills Blender ( not in Taskmanager any longer).
I'll try again :-)

Not realy - Blender was not in Taskmanager any longer Now i did a 2nd test - rendering "freezes" at 11 from 12 tiles,(in Render Window) but time goes on - clicking "X" in Renderwindow also kills Blender ( not in Taskmanager any longer). I'll try again :-)

Rainer Osselmann commented

2020-01-09 13:55:03 +01:00

So - now i did Find missing Files 1rst, than saved the Blendfile and rendered several times with different samples - works fine :-)

Richard Antalik commented

2020-01-19 23:37:53 +01:00

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

Richard Antalik closed this issue

2020-01-19 23:37:53 +01:00

Richard Antalik self-assigned this 2020-01-19 23:37:53 +01:00

Richard Antalik commented

2020-01-19 23:37:53 +01:00

Thanks for update.

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Blender 2.80 GUI disappears during Cycles render with two GPU #68634