[SOLVED] Can I properly enable OpenCL on Windows 11 and Intel Iris Xe graphics in Darktable 4.0?

Software darktable
,
11

I think I got it to work! It looks like there is a bug in the code which makes it not fully respect the opencl_disable_drivers_blacklist=TRUE config parameter. And also I had to delete already registered configurations for my devices from the darktablerc file under the names cldevice_v4_intelririsrxegraphics etc. Then, re-run the darktable-cltest.exe two times for it to compile the kernel modules for my GPU. And now OpenCL works :slight_smile:

More detailed solution:

How to fix the issue with OpenCL not working on Windows with an Intel integrated graphics:
(As of Darktable version 4.0)

  • Go to C:\Users<Username>\AppData\Local\darktable
  • Open the darktablerc file. Search for already configured CL devices: these will have config keys starting with cldevice_
  • Delete all the lines starting with cldevice_ to essentially delete already configured devices for OpenCL.
  • Check if there is a already a line starting with opencl_disable_drivers_blacklist=. If so, add TRUE at the end or else, add a new line with opencl_disable_drivers_blacklist=TRUE
  • Go to the Darktable bin folder where you will find darktable_cltest.exe. At the moment, due to a bug, you will have to run the following command twice to properly setup your integrated GPU to use OpenCL: darktable-cltest.exe -d opencl (if they incorporate my bug fix, then you only need to run this command once)
    • You probably don’t have to run darktable-cltest.exe but perhaps just open darktable and it may also setup OpenCL devices
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