nvidia et opencl [RESOLU]

[doume]

Bonjour

Je n'arrive plus à activer l'option open CL dans darktable 3.0
Quand je le lance dans un terminal en openCL, il y a un message qui me dit

0.072551 [opencl_init] opencl related configuration options:
0.072566 [opencl_init]
0.072568 [opencl_init] opencl: 1
0.072572 [opencl_init] opencl_library: ''
0.072574 [opencl_init] opencl_memory_requirement: 768
0.072578 [opencl_init] opencl_memory_headroom: 400
0.072580 [opencl_init] opencl_device_priority: '*/!0,*/*/*'
0.072585 [opencl_init] opencl_mandatory_timeout: 200
0.072587 [opencl_init] opencl_size_roundup: 16
0.072590 [opencl_init] opencl_async_pixelpipe: 0
0.072592 [opencl_init] opencl_synch_cache: active module
0.072594 [opencl_init] opencl_number_event_handles: 25
0.072596 [opencl_init] opencl_micro_nap: 1000
0.072598 [opencl_init] opencl_use_pinned_memory: 0
0.072601 [opencl_init] opencl_use_cpu_devices: 0
0.072603 [opencl_init] opencl_avoid_atomics: 0
0.072605 [opencl_init]
0.072723 [opencl_init] could not find opencl runtime library 'libOpenCL'
0.072776 [opencl_init] could not find opencl runtime library 'libOpenCL.so'
0.072830 [opencl_init] could not find opencl runtime library 'libOpenCL.so.1'
0.072834 [opencl_init] no working opencl library found. Continue with opencl disabled
0.072835 [opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
0.072836 [opencl_init] initial status of opencl enabled flag is OFF.

(darktable:2502): GLib-GObject-CRITICAL **: 14:31:06.878: g_object_set_data: assertion 'G_IS_OBJECT (object)' failed

(darktable:2502): Gtk-CRITICAL **: 14:31:06.878: gtk_widget_get_has_tooltip: assertion 'GTK_IS_WIDGET (widget)' failed

(darktable:2502): GLib-GIO-WARNING **: 14:31:10.568: Error creating IO channel for /proc/self/mountinfo: Permission denied (g-file-error-quark, 2)

et il me semblait pourtant les avoir installées !
Mon driver est un testé 435.

J'ai cherché avant de poster en vain.

Merci à vous

Doumé