With kernel 5.9 from unstable darktable
is not able to use opencl.
1# darktable -d opencl
0.116651 [opencl_init] opencl related configuration options:
0.116658 [opencl_init]
0.116659 [opencl_init] opencl: 1
0.116660 [opencl_init] opencl_scheduling_profile: 'default'
0.116662 [opencl_init] opencl_library: ''
0.116665 [opencl_init] opencl_memory_requirement: 768
0.116667 [opencl_init] opencl_memory_headroom: 400
0.116670 [opencl_init] opencl_device_priority: '*/!0,*/*/*/!0,*'
0.116672 [opencl_init] opencl_mandatory_timeout: 200
0.116673 [opencl_init] opencl_size_roundup: 16
0.116674 [opencl_init] opencl_async_pixelpipe: 0
0.116675 [opencl_init] opencl_synch_cache: active module
0.116677 [opencl_init] opencl_number_event_handles: 25
0.116678 [opencl_init] opencl_micro_nap: 1000
0.116680 [opencl_init] opencl_use_pinned_memory: 0
0.116683 [opencl_init] opencl_use_cpu_devices: 0
0.116684 [opencl_init] opencl_avoid_atomics: 0
0.116685 [opencl_init]
0.117323 [opencl_init] found opencl runtime library 'libOpenCL'
0.117337 [opencl_init] opencl library 'libOpenCL' found on your system and loaded
0.185940 [opencl_init] could not get platforms: -1001
0.185950 [opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
0.185952 [opencl_init] initial status of opencl enabled flag is OFF.