Blender - Error when I install the Radeon Pro Render Plugin

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1

NixOS 21.05 (Okapi)
AMD® Ryzen 5 3600 6-core processor × 12
Radeon RX 580 Series (POLARIS10, DRM 3.40.0, 5.10.81, LLVM 11.1.0)

I get the following error when installing the Radeon Pro Render Plugin.

Bildschirmfoto von 2021-12-19 00-57-10
Bildschirmfoto von 2021-12-19 00-57-10951×481 107 KB

I had done the following as per the instructions here:

https://radeon-pro.github.io/RadeonProRenderDocs/en/plugins/blender/installation.html

Would be grateful for any help.

2

I just had a look at the installation instructions you posted, the download links there point to the release from a year ago and there are newer ones: Releases · GPUOpen-LibrariesAndSDKs/RadeonProRenderBlenderAddon · GitHub

I tried getting them to work by adding with pkgs; [ libGL stdenv.cc.cc.lib vulkan-loader rocm-opencl-icd rocm-opencl-runtime "$HOME/.config/blender/2.93/scripts/addons/rprblender" ] to my LD_LIBRARY_PATH when starting blender.
That seems to enable the plugin to load, but blender crashes with

mesa: CommandLine Error: Option 'help-list' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options

(I also marked all the *.so files as executable, not sure if that makes a difference.)

I guess multiple LLVM versions get loaded and clash, but I don’t understand why it loads mesa, even if I force amdvlk with VK_ICD_FILENAMES=/run/opengl-driver/share/vulkan/icd.d/amd_icd64.json.

3

I got the plugin in version 3.3.15 (latest) and 3.3.0 working by uninstalling rocm (I had it in hardware.opengl.extraPackages) and using with pkgs; [ libGL stdenv.cc.cc.lib vulkan-loader ocl-icd "$HOME/.config/blender/2.93/scripts/addons/rprblender" ] as my LD_LIBRARY_PATH. Enabling the plugin takes a while because it downloads packages and blocks the ui during that time.

The LLVM versions of mesa used for OpenGL and of ROCm clashed.

4

Thank you for your feedback. But I am still a bit new to Nixos and probably also to Blender. I have read this part NixOS - NixOS 21.11 manual. But at the moment I am not sure how you mean it exactly. Can you briefly show me what you have entered in your configuration.nix. That would help me a lot.

At the moment, it would be enough for me to get “Cycles” and “Eevee” to work via the Gpu. And since I have a Ryzen and AMD GPU, I came up with the “Radeon Pro Render Plugin”.

Thanks for your support

5

Ah, I first thought you just wanted to get the Radeon plugin to work and CPU or GPU doesn’t matter.

With the LD_LIBRARY_PATH I set, I still only got the CPU (OpenCL) renderer of the Radeon Pro plugin working.
The problem with rendering on the GPU is that the LLVM versions of mesa (needed for OpenGL/the Blender UI) and ROCm (AMD’s OpenCL implementation for GPU rendering) bite themselves. I found an old issue for that: https://github.com/NixOS/nixpkgs/issues/97401
I couldn’t get the workaround from that ticket (compiling mesa with llvmPackages_rocm) to work because mesa complains about a missing libllvm in llvmPackages_rocm.

There seems to be an easier workaround mentioned on the llvm mailing list: [llvm-dev] Linking against LLVM and conflicting with system mesa
Unfortunately, I don’t have time to try this out, but if someone wants to try, I’m happy to help.

Maybe headless rendering in Blender works (as it shouldn’t need OpenGL)?

On a sidenote, Blender 3 will not have an OpenCL renderer but will use cuda on nvidia or hip on amd instead. But as hip builds upon rocm, it ends up with the same problem.

6

Now I understand all your problems a little better. Thank you very much! OpenCL is also running quite well for me so far.
But I have nothing in my configuration.nix:

hardware.opengl.extraPackages = with pkgs; [
   rocm-opencl-icd
   rocm-opencl-runtime
  ];

And you mean, if I want to set up the Pro Render plugin, that has to come out again and I have to set the LD_LIBRARY_PATH?
So I can’t use OpenCL and the Pro Render plugin at the same time? So not by changing the settings in Blender.
Have I understood this correctly so far?
But what do you write in configutation.nix to set the LD_LIBRARY_PATH for the Pro Render Plugin? Or do I just have a knot in my head?

Thank you very much

Bavra

7

I just met the same error on Blender 3.0.0 with RPR plugin 3.3.15, and installed amdgpu pro driver via amdgpu-install. Starting blender with blender-softwaregl could using both GPU / CPU rendering via RPR, but UI became very lagging.

8

Thank You! Good to hear. But when I start Blender now and set under “Render Properties” → “Cycles” Blender crashes completely. Also when I go to “Edit” → “Preferences” → “System” Blender crashes immediately with this Error:

mesa: CommandLine Error: Option 'help-list' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
Aborted (Speicherabzug geschrieben)

What does that tell me now?
My GPU configuration in the configuration.nix:

  hardware.opengl.enable = true;
 # To enable vulkan
  hardware.opengl.driSupport = true;
  # For 32 bit applications
  hardware.opengl.driSupport32Bit = true;
  #AMD Graphics Core Next (GCN)
  hardware.opengl.extraPackages = with pkgs; [
   amdvlk
   rocm-opencl-icd
   rocm-opencl-runtime
  ];
9

The issue between mesa and ROCm has been fixed by linking llvm statically into ROCm: llvmPackages_rocm.llvm: don't build shared libs by InternetUnexplorer · Pull Request #163698 · NixOS/nixpkgs · GitHub
So, using the GPU renderer should work with ROCm from master (or unstable in a couple of days).