[Please keep the bug Cc:ed] On 2016-03-21 22:09, Michael Below wrote: > Hi, > > Am Mo 21 Mär 2016 00:12:04 CET > schrieb Andreas Beckmann <[email protected]>: > >>> I just did a reboot, started darktable >> >> you start darktable manually? > > Yes, for testing purposes I start darktable from a terminal window > using "darktable -d opencl" for opencl debugging output. Otherwise you > just notice that the image processing is _slow_. > >> Which libopencl1 library are you using? >> (Note to myself: collect this info in bug-control, and the installed >> icds, too, and /etc/OpenCL/vendors in bug-script) > > I was using ocl-icd-opencl1 2.2.9-1. I noticed that I have both an > amd64 and an i386 version of the library installed, and I don't > think I am using any i386 opencl programs -- should I remove that one? > >> Please install the ocd-icd-libopencl1 and clinfo packages from >> stretch. > > Done, I already had those installed. > >> and now try clinfo (on the nvidia platform only) to see whether the >> nvidia-uvm module is loaded automatically > > First I tried it without setting the variable: > > $ clinfo > modprobe: ERROR: could not insert 'nvidia_current_uvm': Operation not > permitted modprobe: ERROR: ../libkmod/libkmod-module.c:977 command_do() > Error running install command for nvidia_uvm modprobe: ERROR: could not > insert 'nvidia_uvm': Operation not permitted Number of > platforms 0 > > Then I tried it with OCL_ICD_VENDORS set, same result. > > Any idea what to check next? Maybe the nvidia-icd-libopencl1?
No, it's not a problem with libOpenCL.so, but some permission problem with loading the module. So let's try what should happen within clinfo manually: (as root) # modprobe -r nvidia-uvm (as user) $ modprobe -v nvidia-uvm I expect this to fail similarily to the following error: ===== install modprobe nvidia ; modprobe -i nvidia-current-uvm $CMDLINE_OPTS insmod /lib/modules/4.3.0-1-amd64/nvidia/nvidia-current.ko modprobe: ERROR: could not insert 'nvidia_current_uvm': Operation not permitted modprobe: ERROR: ../libkmod/libkmod-module.c:977 command_do() Error running install command for nvidia_uvm modprobe: ERROR: could not insert 'nvidia_uvm': Operation not permitted ===== But the libnvidia-opencl.so.1 library does not call modprobe directly, it uses the nvidia-modprobe setuid root wrapper instead: (as user) $ nvidia-modprobe -u $ dmesg | tail $ ls -la /usr/bin/nvidia-modprobe Does that work? If it doesn't, do you use anything for extra hardening of the system? (selinux, apparmor, ...?) Andreas
