Thank you for quick reply. You were right. It's look like it's the same problem as reported in #888952 When after reboot I don't run clinfo as a root, the NVidia OpenCL platform is not visible. After running 'sudo clinfo' it starts to work properly. It's reproducible all the time.
It looks like nvidia_uvm kernel module is loaded when clinfo is used when I run folowing commands: $ lsmod >modules_before.txt $ sudo clinfo $ lsmod >modules_after.txt $ diff modules_before.txt modules_after.txt the output if diff is following: 1a2 > nvidia_uvm 765952 0 79c80 < nvidia 13168640 1057 nvidia_modeset --- > nvidia 13168640 1055 nvidia_modeset,nvidia_uvm This is the output of clinfo run as a root: X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 Number of platforms 2 Platform Name Intel Gen OCL Driver Platform Vendor Intel Platform Version OpenCL 2.0 beignet 1.3 Platform Profile FULL_PROFILE Platform Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable _store cl_khr_3d_image_writes cl_khr_image2d_from_buffer cl_khr_depth_images cl_khr_spir cl_khr_icd cl_intel_accelerator cl_intel_subgroups cl_intel_subgroups_short cl_khr_gl_sharing Platform Extensions function suffix Intel X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 Platform Name NVIDIA CUDA Platform Vendor NVIDIA Corporation Platform Version OpenCL 1.2 CUDA 9.0.282 Platform Profile FULL_PROFILE Platform Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_byte _addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_nv_create_buffer Platform Extensions function suffix NV Platform Name Intel Gen OCL Driver Number of devices 1 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 Device Name Intel(R) HD Graphics Haswell GT2 Desktop Device Vendor Intel Device Vendor ID 0x8086 Device Version OpenCL 1.2 beignet 1.3 Driver Version 1.3 Device OpenCL C Version OpenCL C 1.2 beignet 1.3 Device Type GPU Device Available Yes Device Profile FULL_PROFILE Max compute units 20 Max clock frequency 1000MHz Device Partition (core) Max number of sub-devices 1 Supported partition types None, None, None Max work item dimensions 3 Max work item sizes 512x512x512 Max work group size 512 Compiler Available Yes Linker Available Yes X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 Preferred work group size multiple 16 Preferred / native vector sizes char 16 / 8 short 8 / 8 int 4 / 4 long 2 / 2 half 0 / 8 (n/a) float 4 / 4 double 0 / 2 (n/a) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) Denormals No Infinity and NANs Yes Round to nearest Yes Round to zero No Round to infinity No IEEE754-2008 fused multiply-add No Support is emulated in software No Correctly-rounded divide and sqrt operations No Double-precision Floating-point support (n/a) Address bits 32, Little-Endian Global memory size 2147483648 <(214)%20748-3648> (2GiB) Error Correction support No Max memory allocation 1610612736 (1.5GiB) Unified memory for Host and Device Yes Minimum alignment for any data type 128 bytes Alignment of base address 1024 bits (128 bytes) Global Memory cache type Read/Write Global Memory cache size 8192 (8KiB) Global Memory cache line size 64 bytes Image support Yes Max number of samplers per kernel 16 Max size for 1D images from buffer 65536 pixels Max 1D or 2D image array size 2048 images Base address alignment for 2D image buffers 4096 bytes Pitch alignment for 2D image buffers 1 pixels Max 2D image size 8192x8192 pixels Max 3D image size 8192x8192x2048 pixels Max number of read image args 128 Max number of write image args 8 Local memory type Local Local memory size 65536 (64KiB) Max constant buffer size 134217728 (128MiB) Max number of constant args 8 Max size of kernel argument 1024 Queue properties Out-of-order execution No Profiling Yes Prefer user sync for interop Yes Profiling timer resolution 80ns Execution capabilities Run OpenCL kernels Yes Run native kernels Yes SPIR versions 1.2 printf() buffer size 1048576 (1024KiB) Built-in kernels __cl_copy_region_align4;__cl_copy_region_align16;__cl_cpy_ region_unalign_same_offset;__cl_copy_region_unalign_dst_ offset;__cl_copy_region_unalign_src_offset;__cl _copy_buffer_rect;__cl_copy_image_1d_to_1d;__cl_copy_ image_2d_to_2d;__cl_copy_image_3d_to_2d;__cl_copy_image_2d_to_3d;__cl_copy_ image_3d_to_3d;__cl_copy_image_2d_to_buffer;__cl_copy_ image_3d_to_buffer;__cl_copy_ buffer_to_image_2d;__cl_copy_buffer_to_image_3d;__cl_fill_ region_unalign;__cl_fill_region_align2;__cl_fill_region_align4;__cl_fill_ region_align8_2;__cl_fill_region_align8_4;__cl_fill_ region_align8_8;__cl_fill_re gion_align8_16;__cl_fill_region_align128;__cl_fill_ image_1d;__cl_fill_image_1d_array;__cl_fill_image_2d;__cl_ fill_image_2d_array;__cl_fill_image_3d; Device Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable _store cl_khr_3d_image_writes cl_khr_image2d_from_buffer cl_khr_depth_images cl_khr_spir cl_khr_icd cl_intel_accelerator cl_intel_subgroups cl_intel_subgroups_short cl_khr_gl_sharing Platform Name NVIDIA CUDA Number of devices 1 Device Name GeForce GTX 1050 Device Vendor NVIDIA Corporation Device Vendor ID 0x10de Device Version OpenCL 1.2 CUDA Driver Version 384.111 Device OpenCL C Version OpenCL C 1.2 Device Type GPU Device Available Yes Device Profile FULL_PROFILE Device Topology (NV) PCI-E, 01:00.0 Max compute units 5 Max clock frequency 1455MHz Compute Capability (NV) 6.1 Device Partition (core) Max number of sub-devices 1 Supported partition types None Max work item dimensions 3 Max work item sizes 1024x1024x64 Max work group size 1024 Compiler Available Yes Linker Available Yes Preferred work group size multiple 32 Warp size (NV) 32 Preferred / native vector sizes char 1 / 1 short 1 / 1 int 1 / 1 long 1 / 1 half 0 / 0 (n/a) float 1 / 1 double 1 / 1 (cl_khr_fp64) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero Yes Round to infinity Yes IEEE754-2008 fused multiply-add Yes Support is emulated in software No Correctly-rounded divide and sqrt operations Yes Double-precision Floating-point support (cl_khr_fp64) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero Yes Round to infinity Yes IEEE754-2008 fused multiply-add Yes Support is emulated in software No Address bits 64, Little-Endian Global memory size 2092892160 <(209)%20289-2160> (1.949GiB) Error Correction support No Max memory allocation 523223040 (499MiB) Unified memory for Host and Device No Integrated memory (NV) No Minimum alignment for any data type 128 bytes Alignment of base address 4096 bits (512 bytes) Global Memory cache type Read/Write Global Memory cache size 81920 (80KiB) Global Memory cache line size 128 bytes Image support Yes Max number of samplers per kernel 32 Max size for 1D images from buffer 134217728 pixels Max 1D or 2D image array size 2048 images Max 2D image size 16384x32768 pixels Max 3D image size 16384x16384x16384 pixels Max number of read image args 256 Max number of write image args 16 Local memory type Local Local memory size 49152 (48KiB) Registers per block (NV) 65536 Max constant buffer size 65536 (64KiB) Max number of constant args 9 Max size of kernel argument 4352 (4.25KiB) Queue properties Out-of-order execution Yes Profiling Yes Prefer user sync for interop No Profiling timer resolution 1000ns Execution capabilities Run OpenCL kernels Yes Run native kernels No Kernel execution timeout (NV) Yes Concurrent copy and kernel execution (NV) Yes Number of async copy engines 2 printf() buffer size 1048576 (1024KiB) Built-in kernels Device Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_byte _addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_nv_create_buffer NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) No platform clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No platform clCreateContext(NULL, ...) [default] No platform X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 X server found. dri2 connection failed! DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument Assuming 131072kB available aperture size. May lead to reduced performance or incorrect rendering. get chip id failed: -1 [22] param: 4, val: 0 clCreateContext(NULL, ...) [other] Success [Intel] clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) No platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) No platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) No platform 2018-02-02 0:24 GMT+01:00 Andreas Beckmann <a...@debian.org>: > On 2018-02-01 22:30, Krzysztof Marczak wrote: > > After lastest update to version nvidia-graphics-drivers 384.111-3 the > OpenCL > > platform in no longer available in the system. clinfo command lists only > other > > platforms (e.g. Intel). > > Just before this update everything worked properly. > > > > I have tried to unistall (purge) all opencl-icd packages and install > again, but > > it did not help. > > > > In actual state there is not possible to run any software using OpenCL > with > > nvidia proprietary drivers. > > Looks like a duplicate of #888952 > Running clinfo as root helped there - is some module not loaded? > > Which package version combination was working previously? > > > Andreas > >