Arch Linux User Repository

update: Wow, it worked! at least up to par with the other setup. But it also fixed the "kernels in a row" bug! Blender OTOH still doesn't even start, segfaulting at trying to find out the device:

AL lib: (EE) UpdateDeviceParams: Failed to set 44100hz, got 48000hz instead

amdgpu_device_initialize: amdgpu_query_info(ACCEL_WORKING) failed (-9) Writing: /tmp/blender.crash.txt

Segmentation fault (core dumped)

-- Here's the backtrace summary, a series of function calls leading to libdrm_amdgpo.so (with an O?)

Blender 2.79 (sub 0), Commit date: 2018-05-26 21:51, Hash 32432d91bbe

backtrace

blender(BLI_system_backtrace+0x34) [0x55e1e8b59b84] blender(+0xb7b8b2) [0x55e1e80e58b2] /usr/lib/libc.so.6(+0x37e00) [0x7fce6db09e00] /usr/lib/libdrm_amdgpo.so.1(amdgpu_get_marketing_name+0xc) [0x7fce485acbdf] /usr/lib/libamdocl-orca64.so(+0x8d871e) [0x7fce4908b71e] [trimmed]

-- I was getting that -9 return code on other openCL stuff too (-36 was another, related to not finding functions), it "can't find the device", notably from clBLAS (NB, no 't' at the end, clblast seem to be more forgiving with our OpenCL 1.1 hardware), but even that seem to be working now, although some results from the example code are a bit weird, like "-nan" instead of a float or too many 0.0000 which suggest rounding problems. (perhaps other constants to set on .bashrc?)

As for Blender, the only suggestion I might have is to disable cycles on compilation (there was a release note back when they finally split the kernels that openCL would only work on 2.78c[1], perhaps still true to SI, only advanced stuff like Baking would not be available, but you WOULD be stuck on that version) and use BlendLuxCore instead, which is just 'out of the oven' with a reboot, re-coded from scratch. All you have to do is download a zip addon. (Arch should have a no-cycles version? is there a cli parameter perhaps?)

Another thing I noticed was that CUDA was mentioned on the installation but I don't think this should be interfering with openCL.

[1] https://en.blender.org/index.php/OpenCL

Edit: added reference

@ArnaudNux I get that message if the Radeon driver is loaded instead of AMDGPU. Have you passed the Kernel Parameter Flags, with your bootloader? (check out the article, linked on previous posts)

@Olympus593 Same problem here, same SI chipset. On a different distro, where I managed to run openCL kernels, clblast example code (cache.c) produces a VERY similar symptom, whereas issuing another kernel to the hardware BEFORE CLEARING (flushing?) the cache breaks the program. The only difference I see is that distro is using the mesa-ocl interface, instead of this "amdocl-orca64" (I tried changing to the amdocl64.icd here in Arch, but didn't work at all, we SHOULD be able to use different "vendor icds" though).

I'll try the recommended bashrc exports to see if Arch gets to at least that same place, past that CL_OUT_OF_HOST_MEMORY.

libdrm and lib32-libdrm to 2.4.93-1

[root@AMD fah]# ./FAHClient --configure 22:40:42:INFO(1):Read GPUs.txt amdgpu_device_initialize: DRM version is 2.50.0 but this driver is only compatible with 3.x.x. No protocol specified

@Nightbane112 It sort of works but very unstable. Obviously, every time I need an app to use OpenCL I must launch it from a terminal to make OpenCL "sort of work"

In blender, it takes 3 tries before it stats to render but it is ridiculously slow (like CPU is several times faster. If you try to hit render again, blender will crash.

On Resolve thumbnail previews are completely useless, playback and render does work, however when using power windows resolve crashes.

Still very buggy. I think it is because of the experimental SI support. I wish I didn't have to launch every app via terminal.

@Olympus593 From the looks of it, I don't think its a driver problem. A bit of searching online lead me to this issue on GitHub (https://github.com/hughperkins/tf-coriander/issues/74)

How about appending this to your bashrc file and see if it changes anything?

#!/bin/bash
export GPU_FORCE_64BIT_PTR=1
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
export GPU_SINGLE_ALLOC_PERCENT=100
export GPU_MAX_HEAP_SIZE=100

@Nightbane112 I am using the amdgpu kernel driver and I have already enabled experimental support (I already double checked to make sure that the driver does load) but every time I try to use OpenCL (for example Blender Cycles Render) it ends with Error -6 CL_OUT_OF_HOST_MEMORY. Same error with DaVinci Resolve.

@Olympus593 Are you using the amdgpu kernel driver? You can try using the experimental support for your GPU series (https://wiki.archlinux.org/index.php/AMDGPU#Enable_Southern_Islands_.28SI.29_and_Sea_Islands_.28CIK.29_support)

From the official amdgpu-pro driver page (https://www.amd.com/en/support/kb/release-notes/rn-prorad-lin-18-30), I could see your GPU is supported but you might need to cross-check on the AMD forums.

Do I need to downgrade Xorg or do some configuration because mine always ends up with Error -6 in any app trying to use OpenCL. I have a GCN 1 card with support provided by the AMDGPU driver.

PSA : I remove my previous comment to avoid confusion as now that this package works with the current version (opencl-amd 18.3.641594).

@stoostranger Haha, seems like this package finally works although still needs the libdrm downgrade shenanigans. Thanks!