Crash with OpenCL rendering (AMD APU) #45056

New Issue

Jhon · 2015-06-13T06:04:15+02:00

Jhon commented

2015-06-13 06:04:15 +02:00

System Information
windows 8.1
AMD A4-5000 APU with radeon(TM) HD Grafics 1.50 GHz
8gb ram
64 bit operating system, x64-based processor

Blender Version
2.75 (rc)

Short description of error
when i try to render using my GPU it says loading render kernal(may take a few minutes the first time). after a minute the program just closes.

Exact steps for others to reproduce the error
does not have steps i just turned on gpu compute and it does this with all files including startup file.

**System Information** windows 8.1 AMD A4-5000 APU with radeon(TM) HD Grafics 1.50 GHz 8gb ram 64 bit operating system, x64-based processor **Blender Version** 2.75 (rc) **Short description of error** when i try to render using my GPU it says loading render kernal(may take a few minutes the first time). after a minute the program just closes. **Exact steps for others to reproduce the error** does not have steps i just turned on gpu compute and it does this with all files including startup file.

Jhon commented

2015-06-13 06:04:15 +02:00

Changed status to: 'Open'

Jhon commented

2015-06-13 06:04:15 +02:00

Added subscriber: @jhonwallace

Bastien Montagne commented

2015-06-13 06:50:34 +02:00

Added subscriber: @mont29

Sergey Sharybin was assigned by Bastien Montagne

2015-06-13 06:50:34 +02:00

Bastien Montagne commented

2015-06-13 06:50:34 +02:00

I’m not sure that kind of low-end 'GPU' can handle at all such a big thing as Cycles kernel (be it split), Sergey?

@jhonwallace can you please run Blender from a console, and report here messages during that loading of render kernel, if any?

I’m not sure that kind of low-end 'GPU' can handle at all such a big thing as Cycles kernel (be it split), Sergey? @jhonwallace can you please run Blender from a console, and report here messages during that loading of render kernel, if any?

Thomas Dinges commented

2015-06-13 10:51:24 +02:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2015-06-13 10:51:24 +02:00

Please make sure that your GPU drivers are up to date.

Jhon commented

2015-06-14 08:14:34 +02:00

I had just updated the drivers and that did not seek to solve it.
I watched the system console during the render and it says (not including the four startup lines).
Device init success
Compiling OpenCL kernal ...
Build flags:

And that's it those show up at start of render and thats all that is there when the program closes.

I had just updated the drivers and that did not seek to solve it. I watched the system console during the render and it says (not including the four startup lines). Device init success Compiling OpenCL kernal ... Build flags: And that's it those show up at start of render and thats all that is there when the program closes.

Thomas Dinges changed title from ~~2.75 rc~~ to Crash with OpenCL rendering (AMD APU)

2015-06-14 16:11:00 +02:00

Sergey Sharybin commented

2015-06-15 19:30:21 +02:00

Seems your configuration is not recognized as officially supported for split kernel and hence megakernel is used which indeed not really stable.

You can do the following:

Open terminal, type: set CYCLES_OPENCL_SPLIT_KERNEL_TEST=1
Open blender from that terminal

If that doesn't help, run blender with --debug-cycles command line argument (from the same terminal). Also having system-info.txt attached here will be handy.

Seems your configuration is not recognized as officially supported for split kernel and hence megakernel is used which indeed not really stable. You can do the following: - Open terminal, type: set CYCLES_OPENCL_SPLIT_KERNEL_TEST=1 - Open blender from that terminal If that doesn't help, run blender with --debug-cycles command line argument (from the same terminal). Also having system-info.txt attached here will be handy.

Jhon commented

2015-06-15 23:17:49 +02:00

Are you referring to blenders terminal or PC terminal. I'm not sure how I would start blender from the blender terminal.

Sergey Sharybin commented

2015-06-15 23:32:16 +02:00

There's no terminal in blender, blender only has python console ;)

I'm talking about terminal emulator from your operation system, aka cmd.exe or command line tool or whatever it's called in modern windows :)

There's no terminal in blender, blender only has python console ;) I'm talking about terminal emulator from your operation system, aka cmd.exe or command line tool or whatever it's called in modern windows :)

Jhon commented

2015-06-16 01:33:03 +02:00

Silly me. I got you now. I have never been in debug mode and it seems that running it through terminal didn't fix it.

Jhon commented

2015-06-16 07:32:37 +02:00

info.txt
this is what i saw in blenders System Console before it closed. i did it through the terminal like you said.

[info.txt](https://archive.blender.org/developer/F192564/info.txt) this is what i saw in blenders System Console before it closed. i did it through the terminal like you said.

Sergey Sharybin commented

2015-06-16 09:17:51 +02:00

Weird. Can you run blender.exe --debug-cycles from the same terminal (dont' forget to set CYCLES_OPENCL_SPLIT_KERNEL_TEST :). THat would give a bit more clues about what's happening in Cycles side.

Weird. Can you run `blender.exe --debug-cycles` from the same terminal (dont' forget to set CYCLES_OPENCL_SPLIT_KERNEL_TEST :). THat would give a bit more clues about what's happening in Cycles side.

Jhon commented

2015-06-16 20:44:12 +02:00

info.txt

[info.txt](https://archive.blender.org/developer/F192812/info.txt)

Jhon commented

2015-06-17 08:31:14 +02:00

i hope that helps. if you need more info let me know.

Sergey Sharybin commented

2015-06-18 19:14:19 +02:00

It seems crash is caused by opencl compiler itself, which is a part of AMD driver. A10 APU seems to work with some latest changes, but other hardware might still need some tweaks.

For now we're only officially supporting AMD GPUs which are GCN and newer. Supporting APU i'd consider a TODO, because it also needs work from AMD about function inline policy.

Tricks like doing feature-selective compilation for shader and baking kernels might help here to make kernel compilable with simplier scenes. It was on own TODO but now i'm mentioned it in there http://wiki.blender.org/index.php/Dev:2.6/Source/Render/Cycles/ToDo#Performance

So thanks for the report, but archiving it for until either we've got developer who can reproduce the issue and try finding a workaround or for until AMD fixes compiler.

It seems crash is caused by opencl compiler itself, which is a part of AMD driver. A10 APU seems to work with some latest changes, but other hardware might still need some tweaks. For now we're only officially supporting AMD GPUs which are GCN and newer. Supporting APU i'd consider a TODO, because it also needs work from AMD about function inline policy. Tricks like doing feature-selective compilation for shader and baking kernels might help here to make kernel compilable with simplier scenes. It was on own TODO but now i'm mentioned it in there http://wiki.blender.org/index.php/Dev:2.6/Source/Render/Cycles/ToDo#Performance So thanks for the report, but archiving it for until either we've got developer who can reproduce the issue and try finding a workaround or for until AMD fixes compiler.

Sergey Sharybin commented

2015-06-18 19:26:23 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2015-06-18 19:26:23 +02:00

Jhon commented

2015-06-18 19:53:02 +02:00

thank you for trying. I hope to use gpu in the future but im in no rush. :) i render using two cpus so im not in in serious need for gpu computing i just thought id give it a shot. both computers i use are very different but niether can use gpu but they are doing just fine for what i need. i love the Blender program and cant wait for what comes in the next updates!!!

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Crash with OpenCL rendering (AMD APU) #45056