Thanks for the quick reply. My issue seems to be different: the first
module gets compiled.
I've tried the workaround, anyway, but it failed:
==
eagle ~ # cd /usr/lib/x86_64-linux-gnu
eagle x86_64-linux-gnu # ls
nvidia/current/libnvidia-ptxjitcompiler.so.1    <-- this was the
original file linked in the workaround description
ls: cannot access 'nvidia/current/libnvidia-ptxjitcompiler.so.1': No
such file or directory
eagle x86_64-linux-gnu # locate libnvidia-ptxjitcompiler.so.1
/usr/lib/nvidia-384/libnvidia-ptxjitcompiler.so.1
/usr/lib32/nvidia-384/libnvidia-ptxjitcompiler.so.1
eagle x86_64-linux-gnu # ln -s
/usr/lib/nvidia-384/libnvidia-ptxjitcompiler.so.1 .
==

darktable output is the same as earlier:
===
[opencl_init] compiling program `demosaic_ppg.cl' ..
[opencl_load_program] loaded cached binary program from file
`/home/kofa/.cache/darktable/cached_kernels_for_GeForceGTX650/demosaic_ppg.cl.bin'
[opencl_load_program] successfully loaded program from
`/usr/share/darktable/kernels/demosaic_ppg.cl'
[opencl_build_program] successfully built program
[opencl_build_program] BUILD STATUS: 0
BUILD LOG:


[opencl_init] compiling program `atrous.cl' ..
[opencl_fopen_stat] could not open file
`/home/kofa/.cache/darktable/cached_kernels_for_GeForceGTX650/atrous.cl.bin'!
[opencl_load_program] could not load cached binary program, trying to
compile source
[opencl_load_program] successfully loaded program from
`/usr/share/darktable/kernels/atrous.cl'
[opencl_build_program] could not build program: -5
[opencl_build_program] BUILD STATUS: -2
BUILD LOG:


[opencl_init] failed to compile program `atrous.cl'!
[opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
[opencl_init] initial status of opencl enabled flag is OFF.
===

Thanks,
Kofa

On 18 December 2017 at 07:33, Pascal Obry <pas...@obry.net> wrote:
>
> István,
>
>> I'm using darktable 2.2.5 from Pascal's PPA on Mint 18.2. I upgraded
>> from Nvidia 340 to 384, now opencl fails. It does compile the first
>> module at least, so I'm not sure if I really have a missing package.
>
> Looks like a known issue fixed in 384.98-3. See
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883303
>
> There is a workaround:
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883303#10
>
> Or upgrade to a new version if possible.
>
> --
>   Pascal Obry /  Magny Les Hameaux (78)
>
>   The best way to travel is by means of imagination
>
>   http://www.obry.net
>
>   gpg --keyserver keys.gnupg.net --recv-key F949BD3B
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