Can't install amdgpu-pro-opencl

lars_the_bear · Guru Joined: 05 Jun 2024 Posts: 472

Hi all

I'm trying to install amdgpu-pro-opencl, in an attempt to get OpenCL support working with my AMQ Rx 460 GPU. I've already tried and failed with rocm-opencl-runtime, which I believe is supposed to work with the open-source amdgpu driver.

When I try to install amdgpu-pro-opencl I get this:

Chiitoo · Posted: Sat Sep 28, 2024 5:43 pm Post subject:

While the page is available via 'archive.org', the download itself does not seem to be, so that ebuild seems to be a lost cause unless AMD only moved the files somewhere else.

I did write an updated ebuild for it once, but that was a few years ago... and will not work as is either.

Additionally, Blender removed their OpenCL support, which would have been my main use for it, and HIP was becoming a thing replacing it (haven't tried that yet).

ROCm was also getting into the business, and I looked into it a bit but it did not quite work for me at the time... and from a quick look now, they officially only support cards starting from RDNA2 [1]... mine being from the previous genre I maybe guess (RX 5700 XT).

Looking at 'mesa', it seems that RX 460 might already be too new for OPenCL from there.

I'll try to look into this more soon(tm).

1. https://rocm.docs.amd.com/projects/install-on-linux/en/latest/reference/system-requirements.html#supported-distributions
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Kindest of regardses.

Goverp · Advocate Joined: 07 Mar 2007 Posts: 2127

I've an RX470, so IIUC a bit newer than the RX460, though both are old...
AFAIK I had it running until last month using rocm-opencl-runtime - I took it out 'cos something broke emerge (I think rocm-cmake moved, and I missed it in amongs Python/Ruby/Qt6/KDE6 and whatever).
I'm just trying to install it again, but it will take a little while - quite a large stack.

UPDATE
Just installed it, quicker than expected.
clinfo fails as reported above.
BUT
rocminfo produces lots of stuff - below.
AFAICT the first important messages in syslog are like the following:

lars_the_bear · Guru Joined: 05 Jun 2024 Posts: 472

Thanks.

With rocm-opencl-runtime, I find that rocminfo seems to produce meaningful output, but clinfo doesn't work. I tried a trivial OpenCL test program, and that failed in the same way. The failure is in clGetPlatformIDs(), which seems to be the first thing that any OpenCL program does. So I suspect that, despite rocminfo appearing to work, anything that actually uses OpenCL will fail immediately.

Another forum user has kindly sent me the Ubuntu package that amdgpu-pro-openc needs. So I was able to install it, and clinfo now seems to do the right thing, and simple test programs work.

To see if it really works, though, I'll need to build Darktable with OpenCL support, which first seems to require rebuilding gcc with Graphite support (whatever that is). So I guess it's going to be some days before I have an answer.

As others have said, ROCm seems to support only a limited range of GPUs, yet the Gentoo documentation positions it as the way forward. Even `emerge amdgpu-pro-openc` displays a message discouraging its use in favour of ROCm. But maybe there is a need still for the proprietary stuff? It's a shame that it's so fiddly to install at present.

BR, Lars.

Goverp · Advocate Joined: 07 Mar 2007 Posts: 2127

I tried chasing down the failure in clinfo. There are several threads in various fora about this. Some say installing ncurses-compat to get libtinfo.so.5 fixes it, but it doesn't for me at least. There are messages in syslog "Failed to map bo to gpuvm" that appear to be relevant.

I'm going to be away from my kit with the RX470 for a week, so that's as far as I'll get for now.
An application test - enabling OpenCl in libreoffice settings, causes libreoffice to die on the next restart, and the next restart after that works, but libreoffice reset the OpenCl support off.
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Greybeard