Radeon 680M and opencl?

What do you mean by environment?

I changed in darktablerc this line:

clplatform_rusticl=radeonsi

which will be changed to false after 1 test.

$ RUSTICL_ENABLE=radeonsi darktable-cltest
darktable 4.6.1
Copyright (C) 2012-2024 Johannes Hanika and other contributors.

Compile options:
  Bit depth              -> 64 bit
  Debug                  -> DISABLED
  SSE2 optimizations     -> ENABLED
  OpenMP                 -> ENABLED
  OpenCL                 -> ENABLED
  Lua                    -> ENABLED  - API version 9.2.0
  Colord                 -> ENABLED
  gPhoto2                -> ENABLED
  GMIC                   -> DISABLED - Compressed LUTs are NOT supported
  GraphicsMagick         -> ENABLED
  ImageMagick            -> DISABLED
  libavif                -> ENABLED
  libheif                -> ENABLED
  libjxl                 -> ENABLED
  OpenJPEG               -> ENABLED
  OpenEXR                -> ENABLED
  WebP                   -> ENABLED

See https://www.darktable.org/resources/ for detailed documentation.
See https://github.com/darktable-org/darktable/issues/new/choose to report bugs.

     0.0153 [dt_get_sysresource_level] switched to 1 as `default'
     0.0153   total mem:       11690MB
     0.0153   mipmap cache:    1461MB
     0.0153   available mem:   5845MB
     0.0153   singlebuff:      91MB
     0.0196 [opencl_init] opencl disabled via darktable preferences
     0.0197 [dt_dlopencl_init] could not find default opencl runtime library 'libOpenCL'
     0.0197 [dt_dlopencl_init] could not find default opencl runtime library 'libOpenCL.so'
     0.0198 [opencl_init] opencl library 'libOpenCL.so.1' found on your system and loaded, preference 'default path'
     0.1033 [opencl_init] found 3 platforms
     0.1034 [check platform] platform 'Clover' with key 'clplatform_clover' is NOT active
     0.1034 [check platform] platform 'rusticl' with key 'clplatform_rusticl' is NOT active
     0.1034 [opencl_init] no devices found for Advanced Micro Devices, Inc. (vendor) - AMD Accelerated Parallel Processing (name)
[opencl_init] found 0 device
     0.1034 [opencl_init] FINALLY: opencl is NOT AVAILABLE and NOT ENABLED.