OpenCL on Intel i3-12100 integrated UHD Graphics 730

remline · September 21, 2026, 7:55pm

I can’t enable OpenCL GPU Acceleration. (I hope I am not spamming by duplicating other OpenCL threads!)

Basically, it seems that clinfo finds a device, but darktable-cltest does not. I think the following snippets are the relevant bits:

$ cat /etc/os-release
NAME="Arch Linux"

$ lscpu
Model name: 12th Gen Intel(R) Core(TM) i3-12100

$ clinfo
Number of platforms 1
  Platform Name     Intel(R) OpenCL Graphics (integrated)
  Platform Version  OpenCL 3.0
Number of devices   1
  Device Name       Intel(R) UHD Graphics 730
  Device Version    OpenCL 3.0 NEO

$ darktable-cltest
darktable 5.6.1 [linux]
Compile options:
  OpenCL                 -> ENABLED
[dt_get_sysresource_level] switched to `default'
  total mem:       15726MB
  available mem:   7863MB
  singlebuff:      122MB
[opencl_init] opencl library 'libOpenCL' found on your system and loaded, preference 'default path'
[opencl_init] found 1 platform
[check platform] platform 'Intel(R) OpenCL Graphics (integrated)' with key 'clplatform_intelropenclgraphicsintegrated' is NOT active
[opencl_init] found 0 device
[opencl_init] FINALLY: opencl PREFERENCE=YES is NOT AVAILABLE and NOT ENABLED

Based on other posts in the forum, I already tried deleting all “opencl” and “clplatform” lines from ~/.config/darktable/darktablerc.

g-man · September 21, 2026, 8:43pm

It says that you don’t have Intel enabled. Is there a check on the checkbox under preferences?

remline · September 21, 2026, 10:17pm

Here is my darktable preferences screen:

Also, darktablerc states:
clplatform_intelropenclhdgraphics=TRUE

g-man · September 21, 2026, 10:34pm

Something is odd. Is this flatpak? app image? self compile?

What are the config settings for that card in darktablerc? We used to blacklist NEO, but I think we remove it (I think).

mikae1 · September 21, 2026, 10:44pm

I seem to have the same problem with my new T14 Gen 7 using the official 5.6.1 AppImage.

Operating System: Fedora Linux 44
KDE Plasma Version: 6.7.5
KDE Frameworks Version: 6.30.0
Qt Version: 6.11.2
Kernel Version: 7.2.5-200.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ Ultra 5 325
Graphics Processor: Intel® Graphics

g-man · September 21, 2026, 10:48pm

Start a new thread with your clinfo.

remline · September 21, 2026, 10:56pm

I am using the Arch Linux package.

Here are the full compile options, in case that reveals anything surprising:

Compile options:
  Bit depth              -> 64 bit
  Exiv2                  -> 0.28.9
  Lensfun                -> 0.3.4
  Debug                  -> DISABLED
  SSE2 optimizations     -> ENABLED
  OpenMP                 -> ENABLED
  OpenCL                 -> ENABLED
  Lua                    -> ENABLED  - API version 9.7.0
  Colord                 -> ENABLED
  gPhoto2                -> ENABLED  - Camera tethering is available
  OSMGpsMap              -> ENABLED  - Map view is available
  GMIC                   -> ENABLED  - Compressed LUTs are supported
  GraphicsMagick         -> ENABLED
  ImageMagick            -> DISABLED
  libavif                -> ENABLED
  libheif                -> ENABLED
  libjxl                 -> ENABLED
  LibRaw                 -> ENABLED  - Version 0.22.0-Release
  OpenJPEG               -> ENABLED
  OpenEXR                -> ENABLED
  WebP                   -> ENABLED
  AI                     -> ENABLED

If I understand correctly, my darktablerc has no config settings for Intel UHD 730 integrated graphics, because it has never seen it as a “found” device. I think these are all of the OpenCL bits from darktablerc:

clplatform_amdacceleratedparallelprocessing=FALSE
clplatform_apple=FALSE
clplatform_intelropenclhdgraphics=TRUE
clplatform_nvidiacuda=TRUE
clplatform_openclon12=FALSE
clplatform_other=FALSE
clplatform_rusticl=TRUE

opencl=FALSE
opencl_fast=FALSE
opencl_library=
opencl_scheduling_profile=default
opencl_tune_headroom=FALSE

Needless to say, setting opencl=TRUE gets overwritten upon darktable launch.

g-man · September 21, 2026, 11:12pm

I don’t get it. What’s the output from darktable-cltest -verbose?

remline · September 21, 2026, 11:22pm

Running darktable-cltest -d verbose adds the line:

[dt_dlopencl_init] found default opencl runtime library 'libOpenCL'

g-man · September 22, 2026, 12:04am

Something is not right. clinfo finds a device but dt doesn’t? I don’t know arch too much. How are you installing the opencl drivers?

Can you post the entire output from darktable-cltest -d verbose?

remline · September 22, 2026, 12:58am

Thank you for all of your assistance. I had previously assumed that OpenCL was simply not available without an Nvidia or AMD card, but it sounds like the Intel integrated GPUs can, in theory, work.

The full output of darktable-cltest -d verbose is attached. Also attached is the clinfo output.

On Arch, I installed two packages earlier today: intel-compute-runtime and clinfo. I already had ocl-icd installed.

darktable-cltest_verbose.txt (1.8 KB)
clinfo.txt (35.5 KB)

g-man · September 22, 2026, 2:29am

I am clueless at this point. Maybe the system needs an OS restart?

g-man · September 26, 2026, 9:33am

I think this might be the solution.

github.com/darktable-org/darktable

opencl: accept Intel platforms renamed in compute-runtime 26.35

master ← mwenzkowski:fix-intel-opencl-platform-names

opened 06:52PM - 25 Sep 26 UTC

mwenzkowski

+4 -0

## Summary Intel compute-runtime 26.35 renamed its OpenCL platform (intel/compu…te-runtime@0522836c43). The name now ends in " (integrated)" or " (discrete)". darktable did not know the new names, so it skipped the platform, found no OpenCL device and disabled OpenCL. This PR adds both names to the Intel platform aliases, so darktable uses these GPUs again. Users who already ran darktable with the new driver keep `opencl=FALSE` after this fix and have to turn OpenCL on again themselves. ## Referenced issue #22386 ## Checklist - [x] I have read [CONTRIBUTING.md](../CONTRIBUTING.md) and the [coding style](https://github.com/darktable-org/darktable/wiki/Developer's-guide#coding-style). - [x] I have not merged master into the topic branch. - [x] The pull request is one logical change, and every commit compiles on its own. - [x] I ran the relevant tests: unit tests, `src/tests/integration/` where the pixelpipe is touched, or `darktable-cli` as a headless smoke test. - [x] New user-visible strings use `_()`, new preferences are registered in `data/darktableconfig.xml.in`. - [x] A `RELEASE_NOTES.md` entry was added (only needed if fixing an issue in a release). Do not reference GitHub issues. ## Test instructions On an Intel GPU with compute-runtime 26.35 or newer, run `darktable-cltest --configdir <empty dir>`. Before (master at 5cb5f621e3): ``` [check platform] platform 'Intel(R) OpenCL Graphics (integrated)' with key 'clplatform_intelropenclgraphicsintegrated' is NOT active [opencl_init] found 0 device [opencl_init] FINALLY: opencl PREFERENCE=YES is NOT AVAILABLE and NOT ENABLED ``` After: ``` [opencl_init] found 1 device PLATFORM, VENDOR & ID: Intel(R) OpenCL Graphics (integrated), Intel(R) Corporation, ID=32902 [opencl_init] FINALLY: opencl PREFERENCE=YES is AVAILABLE and ENABLED ``` The other names can be simulated with the driver's debug keys, for example: ``` NEOReadDebugKeys=1 OverridePlatformName="Intel(R) OpenCL Graphics (discrete)" darktable-cltest --configdir <empty dir> ``` I tested on an Iris Xe (Alder Lake-P) with compute-runtime 26.35.39758.10: - the integrated name, and the discrete and old names through the override - a config with `opencl=FALSE`: OpenCL stays off, but the device is found. After turning on "activate OpenCL support", the darkroom image was processed on the GPU ("29 out of 29 events were successful and 0 events lost"). - builds with OpenCL on and off Not tested: a real discrete Intel GPU, and Windows. ## AI assistance Claude Code (Claude Opus 5.5) wrote the fix and the release note, and ran the `darktable-cltest` checks and both builds. I reviewed the change and ran the GUI tests myself. Fixes #22386

remline · September 27, 2026, 12:42am

That looks extremely promising. Thanks for following up with this helpful information.

remline · October 11, 2026, 12:48am

I can confirm that darktable 5.6.2 fixes OpenCL support on my system. Many thanks!