Am 25.10.2014 um 18:09 schrieb Hans Petter Birkeland:
> Another thread on this list suggested that I needed nvidia-cuda-toolkit
> installed, and so I did. libOpenCL now loads, but I'm stuck. This is the
> relevent part of the output from 'optirun darktable -d opencl':
>
> [opencl_init] trying to load opencl library: '<system default>'
> [opencl_init] opencl library 'libOpenCL' found on your system and loaded
> [opencl_init] could not get platforms: -1001
> [opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
> [opencl_init] initial status of opencl enabled flag is OFF.
>
>
> The problem is the line "could not get platforms: -1001"
>
> /etc/OpenCL/vendors/nvidia.icd points to libnvidia-opencl.so.1 which is a
> symlink to libnvidia-opencl.so.340.46. One suggestion I found was that
> nvidia.icd should point to libcuda.so. I tried that, but it didn't make any
> difference.
>
I can only share with you how that looks like on my PC not with Optimus but
Geforce.
I have debian testing and this is what I have installed:
3# dpkg -l nvidia* | grep ii
ii nvidia-alternative 340.46-3 amd64 allows the
selection of NVIDIA as GLX provider
ii nvidia-driver 340.46-3 amd64 NVIDIA metapackage
ii nvidia-glx 340.46-3 amd64 transition to
nvidia-driver
ii nvidia-installer-cleanup 20131102+2 amd64 cleanup after
driver installation with the nvidia-installer
ii nvidia-kernel-common 20131102+2 amd64 NVIDIA binary
kernel module support files
ii nvidia-kernel-dkms 340.46-3 amd64 NVIDIA binary
kernel module DKMS source
ii nvidia-modprobe 340.46-1 amd64 utility to load
NVIDIA kernel modules and create device nodes
ii nvidia-opencl-common 340.46-3 amd64 NVIDIA OpenCL
driver
ii nvidia-opencl-icd:amd64 340.46-3 amd64 NVIDIA OpenCL
installable client driver (ICD)
ii nvidia-settings 340.46-2 amd64 tool for
configuring the NVIDIA graphics driver
ii nvidia-smi 340.46-3 i386 NVIDIA System
Management Interface
ii nvidia-support 20131102+2 amd64 NVIDIA binary
graphics driver support files
ii nvidia-vdpau-driver:amd64 340.46-3 amd64 Video Decode and
Presentation API for Unix - NVIDIA driver
When I start DT the relevant output is:
[opencl_init] could not find opencl runtime library 'libOpenCL'
[opencl_init] could not find opencl runtime library 'libOpenCL.so'
[opencl_init] found opencl runtime library 'libOpenCL.so.1'
[opencl_init] opencl library 'libOpenCL.so.1' found on your system and loaded
[opencl_init] found 1 platform
[opencl_init] found 1 device
[opencl_init] device 0 `GeForce GTX 750 Ti' has sm_20 support.
[opencl_init] device 0 `GeForce GTX 750 Ti' supports image sizes of 32768 x
32768
[opencl_init] device 0 `GeForce GTX 750 Ti' allows GPU memory allocations of up
to 511MB
[opencl_init] device 0: GeForce GTX 750 Ti
GLOBAL_MEM_SIZE: 2048MB
MAX_WORK_GROUP_SIZE: 1024
MAX_WORK_ITEM_DIMENSIONS: 3
MAX_WORK_ITEM_SIZES: [ 1024 1024 64 ]
DRIVER_VERSION: 340.46
DEVICE_VERSION: OpenCL 1.1 CUDA
Furthermore:
11# cat /etc/OpenCL/vendors/nvidia.icd
libnvidia-opencl.so.1
and
13# locate libnvidia-opencl.so.1 | xargs ls -l
lrwxrwxrwx 1 root root 62 Nov 7 19:01
/etc/alternatives/nvidia--libnvidia-opencl.so.1-x86_64-linux-gnu ->
/usr/lib/x86_64-linux-gnu/nvidia/current/libnvidia-opencl.so.1
lrwxrwxrwx 1 root root 64 Nov 7 19:01
/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.1 ->
/etc/alternatives/nvidia--libnvidia-opencl.so.1-x86_64-linux-gnu
lrwxrwxrwx 1 root root 26 Okt 22 00:18
/usr/lib/x86_64-linux-gnu/nvidia/current/libnvidia-opencl.so.1 ->
libnvidia-opencl.so.340.46
Have you tried to use strace to see if the right opencl library is loaded?
Matthias
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