SUMMARY OpenCL acceleration still not available in 8.7.0 AppImage though it works in other apps STEPS TO REPRODUCE 1. Start digikam (testet with digiKam-8.7.0-Qt6-x86-64.appimage) 2. In Preferences -> System, click "Test GPU AI compatibility" OBSERVED RESULT Starting OpenCV OpenCL DNN test... Checking for OpenCL GPU acceleration compatibility with AI models... Error: OpenCL is not available on this system. Test failed. Your system may not be able to use GPU acceleration for the AI models. EXPECTED RESULT OpenCL is available on the system. - Output of `clinfo` indicates that there is OpenCL support - Darktable successfully uses opencl on the same system (testet with `darktable -d opencl`) SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 25.04 KDE Plasma Version: 6.3.5 NVIDIA driver 570.133.7 ADDITIONAL INFORMATION Output of clinfo: ``` Number of platforms 3 Platform Name Clover Platform Vendor Mesa Platform Version OpenCL 1.1 Mesa 25.0.3-1ubuntu2 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix MESA Platform Name rusticl Platform Vendor Mesa/X.org Platform Version OpenCL 3.0 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions with Version cl_khr_icd 0x400000 (1.0.0) Platform Numeric Version 0xc00000 (3.0.0) Platform Extensions function suffix MESA Platform Host timer resolution 1ns Platform Name NVIDIA CUDA Platform Vendor NVIDIA Corporation Platform Version OpenCL 3.0 CUDA 12.8.97 Platform Profile FULL_PROFILE Platform Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_nv_create_buffer cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_device_uuid cl_khr_pci_bus_info cl_khr_external_semaphore cl_khr_external_memory cl_khr_external_semaphore_opaque_fd cl_khr_external_memory_opaque_fd cl_khr_semaphore Platform Extensions with Version cl_khr_global_int32_base_atomics 0x400000 (1.0.0) cl_khr_global_int32_extended_atomics 0x400000 (1.0.0) cl_khr_local_int32_base_atomics 0x400000 (1.0.0) cl_khr_local_int32_extended_atomics 0x400000 (1.0.0) cl_khr_fp64 0x400000 (1.0.0) cl_khr_3d_image_writes 0x400000 (1.0.0) cl_khr_byte_addressable_store 0x400000 (1.0.0) cl_khr_icd 0x400000 (1.0.0) cl_khr_gl_sharing 0x400000 (1.0.0) cl_nv_compiler_options 0x400000 (1.0.0) cl_nv_device_attribute_query 0x400000 (1.0.0) cl_nv_pragma_unroll 0x400000 (1.0.0) cl_nv_copy_opts 0x400000 (1.0.0) cl_nv_create_buffer 0x400000 (1.0.0) cl_khr_int64_base_atomics 0x400000 (1.0.0) cl_khr_int64_extended_atomics 0x400000 (1.0.0) cl_khr_device_uuid 0x400000 (1.0.0) cl_khr_pci_bus_info 0x400000 (1.0.0) cl_khr_external_semaphore 0x400000 (1.0.0) cl_khr_external_memory 0x400000 (1.0.0) cl_khr_external_semaphore_opaque_fd 0x400000 (1.0.0) cl_khr_external_memory_opaque_fd 0x400000 (1.0.0) cl_khr_semaphore 0x400000 (1.0.0) Platform Numeric Version 0xc00000 (3.0.0) Platform Extensions function suffix NV Platform Host timer resolution 0ns Platform External memory handle types Opaque FD Platform Semaphore types <gatherPlatformInfo:11: get CL_PLATFORM_SEMAPHORE_TYPES_KHR size : error -30> Platform External semaphore import types Opaque FD Platform External semaphore export types <gatherPlatformInfo:13: get CL_PLATFORM_SEMAPHORE_EXPORT_HANDLE_TYPES_KHR : error -30> Platform Name Clover Number of devices 0 Platform Name rusticl Number of devices 0 Platform Name NVIDIA CUDA Number of devices 1 Device Name NVIDIA GeForce RTX 3060 Device Vendor NVIDIA Corporation Device Vendor ID 0x10de Device Version OpenCL 3.0 CUDA Device UUID ee6352cb-da45-b1a6-f94a-d3288cdab3f7 Driver UUID ee6352cb-da45-b1a6-f94a-d3288cdab3f7 Valid Device LUID No Device LUID 6d69-637300000000 Device Node Mask 0 Device Numeric Version 0xc00000 (3.0.0) Driver Version 570.133.07 Device OpenCL C Version OpenCL C 1.2 Device OpenCL C all versions OpenCL C 0x400000 (1.0.0) OpenCL C 0x401000 (1.1.0) OpenCL C 0x402000 (1.2.0) OpenCL C 0xc00000 (3.0.0) Device OpenCL C features __opencl_c_fp64 0xc00000 (3.0.0) __opencl_c_images 0xc00000 (3.0.0) __opencl_c_int64 0xc00000 (3.0.0) __opencl_c_3d_image_writes 0xc00000 (3.0.0) Latest conformance test passed v2023-10-10-00 Device Type GPU Device Topology (NV) PCI-E, 0000:10:00.0 Device PCI bus info (KHR) PCI-E, 0000:10:00.0 Device Profile FULL_PROFILE Device Available Yes Compiler Available Yes Linker Available Yes Max compute units 28 Max clock frequency 1837MHz Compute Capability (NV) 8.6 Device Partition (core) Max number of sub-devices 1 Supported partition types None Supported affinity domains (n/a) Max work item dimensions 3 Max work item sizes 1024x1024x64 Max work group size 1024 Preferred work group size multiple (device) 32 Preferred work group size multiple (kernel) 32 Warp size (NV) 32 Max sub-groups per work group 0 Preferred / native vector sizes char 1 / 1 short 1 / 1 int 1 / 1 long 1 / 1 half 0 / 0 (n/a) float 1 / 1 double 1 / 1 (cl_khr_fp64) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero Yes Round to infinity Yes IEEE754-2008 fused multiply-add Yes Support is emulated in software No Correctly-rounded divide and sqrt operations Yes Double-precision Floating-point support (cl_khr_fp64) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero Yes Round to infinity Yes IEEE754-2008 fused multiply-add Yes Support is emulated in software No Address bits 64, Little-Endian External memory handle types Opaque FD External memory assume linear img handle types (n/a) Semaphore types <printDeviceInfo:106: get number of CL_DEVICE_SEMAPHORE_TYPES_KHR : error -30> External semaphore import types Opaque FD External semaphore export types (n/a) Global memory size 12464553984 (11.61GiB) Error Correction support No Max memory allocation 3116138496 (2.902GiB) Unified memory for Host and Device No Integrated memory (NV) No Shared Virtual Memory (SVM) capabilities (core) Coarse-grained buffer sharing Yes Fine-grained buffer sharing No Fine-grained system sharing No Atomics No Minimum alignment for any data type 128 bytes Alignment of base address 4096 bits (512 bytes) Preferred alignment for atomics SVM 0 bytes Global 0 bytes Local 0 bytes Atomic memory capabilities relaxed, work-group scope Atomic fence capabilities relaxed, acquire/release, work-group scope Max size for global variable 0 Preferred total size of global vars 0 Global Memory cache type Read/Write Global Memory cache size 802816 (784KiB) Global Memory cache line size 128 bytes Image support Yes Max number of samplers per kernel 32 Max size for 1D images from buffer 268435456 pixels Max 1D or 2D image array size 2048 images Base address alignment for 2D image buffers 0 bytes Pitch alignment for 2D image buffers 0 pixels Max 2D image size 32768x32768 pixels Max 3D image size 16384x16384x16384 pixels Max number of read image args 256 Max number of write image args 32 Max number of read/write image args 0 Pipe support No Max number of pipe args 0 Max active pipe reservations 0 Max pipe packet size 0 Local memory type Local Local memory size 49152 (48KiB) Registers per block (NV) 65536 Max number of constant args 9 Max constant buffer size 65536 (64KiB) Generic address space support No Max size of kernel argument 32764 (32KiB) Queue properties (on host) Out-of-order execution Yes Profiling Yes Device enqueue capabilities (n/a) Queue properties (on device) Out-of-order execution No Profiling No Preferred size 0 Max size 0 Max queues on device 0 Max events on device 0 Prefer user sync for interop No Profiling timer resolution 1000ns Execution capabilities Run OpenCL kernels Yes Run native kernels No Non-uniform work-groups No Work-group collective functions No Sub-group independent forward progress No Kernel execution timeout (NV) No Concurrent copy and kernel execution (NV) Yes Number of async copy engines 2 IL version (n/a) ILs with version (n/a) printf() buffer size 1048576 (1024KiB) Built-in kernels (n/a) Built-in kernels with version (n/a) Device Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_nv_create_buffer cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_device_uuid cl_khr_pci_bus_info cl_khr_external_semaphore cl_khr_external_memory cl_khr_external_semaphore_opaque_fd cl_khr_external_memory_opaque_fd cl_khr_semaphore Device Extensions with Version cl_khr_global_int32_base_atomics 0x400000 (1.0.0) cl_khr_global_int32_extended_atomics 0x400000 (1.0.0) cl_khr_local_int32_base_atomics 0x400000 (1.0.0) cl_khr_local_int32_extended_atomics 0x400000 (1.0.0) cl_khr_fp64 0x400000 (1.0.0) cl_khr_3d_image_writes 0x400000 (1.0.0) cl_khr_byte_addressable_store 0x400000 (1.0.0) cl_khr_icd 0x400000 (1.0.0) cl_khr_gl_sharing 0x400000 (1.0.0) cl_nv_compiler_options 0x400000 (1.0.0) cl_nv_device_attribute_query 0x400000 (1.0.0) cl_nv_pragma_unroll 0x400000 (1.0.0) cl_nv_copy_opts 0x400000 (1.0.0) cl_nv_create_buffer 0x400000 (1.0.0) cl_khr_int64_base_atomics 0x400000 (1.0.0) cl_khr_int64_extended_atomics 0x400000 (1.0.0) cl_khr_device_uuid 0x400000 (1.0.0) cl_khr_pci_bus_info 0x400000 (1.0.0) cl_khr_external_semaphore 0x400000 (1.0.0) cl_khr_external_memory 0x400000 (1.0.0) cl_khr_external_semaphore_opaque_fd 0x400000 (1.0.0) cl_khr_external_memory_opaque_fd 0x400000 (1.0.0) cl_khr_semaphore 0x400000 (1.0.0) NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) No platform clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No platform clCreateContext(NULL, ...) [default] No platform clCreateContext(NULL, ...) [other] Success [NV] clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) No devices found in platform ```
Hi The NVIDIA/OpenCL support in OpenCV used by digiKam on the AppImage bundle need to be recompiled with the right options. This will be done soon for the 8.8.0 release. Best regards Gilles Caulier
cs@ccss.de The digiKam 8.8.0 pre-relelase AppImage have been rebuilt using last Qt 6.9.1, OpenCV 4.12, and KDE framework 6.16. https://files.kde.org/digikam/digiKam-8.8.0-20250719T191430-Qt6-x86-64.appimage.mirrorlist Can you reproduce the problem with this version? Best regards Gilles Caulier
(In reply to caulier.gilles from comment #2) > cs@ccss.de > > The digiKam 8.8.0 pre-relelase AppImage have been rebuilt using last Qt > 6.9.1, OpenCV 4.12, and KDE framework 6.16. > > https://files.kde.org/digikam/digiKam-8.8.0-20250719T191430-Qt6-x86-64. > appimage.mirrorlist > > Can you reproduce the problem with this version? It's still saying "OpenCL is not available on this system". Tested with digiKam-8.8.0-20250720T145923-Qt6-x86-64.appimage
Please try again : If someone wants to use CUDA and OpenCL support in digicam and has multiple GPUs in their system, they should set the GPU before starting the application. To do this, you can use the following commands in the terminal: To use the first NVIDIA GPU: export CUDA_VISIBLE_DEVICES="0" To use the second NVIDIA GPU: export CUDA_VISIBLE_DEVICES="1" For systems with mixed AMD/NVIDIA GPUs (like mine): export OPENCV_OPENCL_DEVICE=NVIDIA:GPU Then, run digiKam using the following command: ./digiKam-8.7.0-Qt5-x86-64.appimage Note: This will work also with current 8.8.0 pre-release AppImage. Gilles Caulier
Just tried the latest pre-release AppImage digiKam-8.8.0-20250915T060040-Qt6-x86-64.appimage and I can confirm that opencl now works on my system. Thank you very much!