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Is there some instructions on how to get opencl with gpu working on the C4 with armbian ? I found https://wiki.odroid.com/odroid-c4/os_images/ubuntu/minimal/20200526#opencl_configuration but the package mali-fbdev isn't available on armbian. Closest I've got is : $ curl -L http://deb.odroid.in/c4/pool/main/m/mali-midgard-driver/mali-fbdev_0.1-2ubuntu4_arm64.deb -o mali-fbdev_0.1-2ubuntu4_arm64.deb $ ar -xv mali-fbdev_* $ tar --use-compress-program=unzstd -xvf data.tar.zst $ sudo cp -r usr/* /usr/ $ mkdir -p /etc/OpenCL/vendors/ $ echo /usr/share/mali-odroid-c4/libmali.so | sudo tee /etc/OpenCL/vendors/mali.icd But then clinfo fails with : $ clinfo Number of platforms 1 Platform Name ARM Platform Platform Vendor ARM Platform Version OpenCL 2.0 git.c8adbf9.ad00b04c1b60847de257177231dc1a53 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_byte_addressable_store cl_khr_3d_image_writes cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_fp16 cl_khr_icd cl_khr_egl_image cl_khr_image2d_from_buffer cl_khr_depth_images cl_khr_create_command_queue cl_arm_core_id cl_arm_printf cl_arm_thread_limit_hint cl_arm_non_uniform_work_group_size cl_arm_import_memory cl_arm_shared_virtual_memory Platform Extensions function suffix ARM Platform Name ARM Platform Number of devices 1 Failed creating base context during opening of kernel driver. So, presumably, there is a kernel module to be installed as well. I also found https://developer.arm.com/downloads/-/mali-drivers/user-space ... but doesn't indicate support for the C4. Any hints to get further ? Thanks.