I have on nvidia gforce GTX 860M on my laptop, and I just installed CUDA 7 with new driver. After installation I run deviceQuerry and it passed the test, alongside with the bandwidth test. All the other tests in Nvidia Samples are failing.
Another thing is that when I return my laptop from sleep, I cant run even deviceQuerry, it says no capable cuda device found. After rebooting i can again run deviceQuerry, but all the other tests fail again.
this is result of deviceQuerry
CUDA Device Query (Runtime API) version (CUDART static linking) Detected 1 CUDA Capable device(s) Device 0: "GeForce GTX 860M" CUDA Driver Version / Runtime Version 7.0 / 7.0 CUDA Capability Major/Minor version number: 5.0 Total amount of global memory: 2048 MBytes (2147352576 bytes) ( 5) Multiprocessors, (128) CUDA Cores/MP: 640 CUDA Cores GPU Max Clock rate: 1020 MHz (1.02 GHz) Memory Clock rate: 2505 Mhz Memory Bus Width: 128-bit L2 Cache Size: 2097152 bytes Maximum Texture Dimension Size (x,y,z) 1D=(65536), 2D=(65536, 65536), 3D=(4096, 4096, 4096) Maximum Layered 1D Texture Size, (num) layers 1D=(16384), 2048 layers Maximum Layered 2D Texture Size, (num) layers 2D=(16384, 16384), 2048 layers Total amount of constant memory: 65536 bytes Total amount of shared memory per block: 49152 bytes Total number of registers available per block: 65536 Warp size: 32 Maximum number of threads per multiprocessor: 2048 Maximum number of threads per block: 1024 Max dimension size of a thread block (x,y,z): (1024, 1024, 64) Max dimension size of a grid size (x,y,z): (2147483647, 65535, 65535) Maximum memory pitch: 2147483647 bytes Texture alignment: 512 bytes Concurrent copy and kernel execution: Yes with 1 copy engine(s) Run time limit on kernels: No Integrated GPU sharing Host Memory: No Support host page-locked memory mapping: Yes Alignment requirement for Surfaces: Yes Device has ECC support: Disabled Device supports Unified Addressing (UVA): Yes Device PCI Domain ID / Bus ID / location ID: 0 / 1 / 0 Compute Mode: < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) > deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 7.0, CUDA Runtime Version = 7.0, NumDevs = 1, Device0 = GeForce GTX 860M Result = PASS
Even though it passes this test it is not able to run any of the sample codes.
after putting laptop to the sleep I get following message
./deviceQuery Starting... CUDA Device Query (Runtime API) version (CUDART static linking) cudaGetDeviceCount returned 38 -> no CUDA-capable device is detected Result = FAIL
these are some of the readings
lsmod | grep nvidia nvidia_uvm 67139 0 nvidia 8370760 1 nvidia_uvm drm 303102 8 i915,drm_kms_helper,nvidia cat /proc/driver/nvidia/version NVRM version: NVIDIA UNIX x86_64 Kernel Module 346.46 Tue Feb 17 17:56:08 PST 2015 GCC version: gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) lspci | grep -i nvidia 01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 860M] (rev ff) ls -al /dev/nvidia* crw-rw-rw- 1 root root 195, 0 Apr 8 21:59 /dev/nvidia0 crw-rw-rw- 1 root root 195, 255 Apr 8 21:59 /dev/nvidiactl crw-rw-rw- 1 root root 250, 0 Apr 8 21:59 /dev/nvidia-uvm
as well I get message after running nvidia-settings :
You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run
nvidia-xconfig as root), and restart the X server.
I did previously run nvidia-xconfig as root