Comment 4 for bug 1311362

I think this is something that is unrelated to nvidia and/or darktable - I had updates of "lib-mesa" on 2014-07-10 (Thursday) and believe I didn't run darktable much yesterday (Friday).

It seems as darktable at least gets a bit further, with "opencl_library=libnvidia-opencl.so.1" in "~/.config/darktable/darktablerc"

$ darktable -d opencl
[opencl_init] opencl related configuration options:
[opencl_init]
[opencl_init] opencl: 1
[opencl_init] opencl_library: 'libnvidia-opencl.so.1'
[opencl_init] opencl_memory_requirement: 768
[opencl_init] opencl_memory_headroom: 300
[opencl_init] opencl_device_priority: '*/!0,*/*/*'
[opencl_init] opencl_size_roundup: 16
[opencl_init] opencl_async_pixelpipe: 0
[opencl_init] opencl_synch_cache: 0
[opencl_init] opencl_number_event_handles: 25
[opencl_init] opencl_micro_nap: 1000
[opencl_init] opencl_use_pinned_memory: 0
[opencl_init] opencl_use_cpu_devices: 0
[opencl_init] opencl_avoid_atomics: 0
[opencl_init] opencl_omit_whitebalance: 0
[opencl_init]
[opencl_init] trying to load opencl library: 'libnvidia-opencl.so.1'
[opencl_init] could not load all required symbols from library
[opencl_init] no working opencl library found. Continue with opencl disabled
[opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
[opencl_init] initial status of opencl enabled flag is OFF.

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