Yes, I am sure that my user is added to vglusers group. This is the output of issuing groups command on user ubuntu
[ubuntu: ~] $ groups ubuntu ubuntu : ubuntu adm dialout sudo audio video vglusers
Yes, they do work when I launch them using the display directly connected to my Jetson TK1.
Yes, non-OpenGL examples work flawlessly. This is the output of deviceQuery program:
[ubuntu: ~/NVIDIA_CUDA-6.5_Samples/bin/armv7l/linux/release/gnueabihf] $ ./deviceQuery ./deviceQuery Starting... CUDA Device Query (Runtime API) version (CUDART static linking) Detected 1 CUDA Capable device(s) Device 0: "GK20A" CUDA Driver Version / Runtime Version 6.5 / 6.5 CUDA Capability Major/Minor version number: 3.2 Total amount of global memory: 1892 MBytes (1984385024 bytes) ( 1) Multiprocessors, (192) CUDA Cores/MP: 192 CUDA Cores GPU Clock rate: 852 MHz (0.85 GHz) Memory Clock rate: 924 Mhz Memory Bus Width: 64-bit L2 Cache Size: 131072 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: 32768 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: Yes 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 Bus ID / PCI location ID: 0 / 0 Compute Mode: < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) > deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 6.5, CUDA Runtime Version = 6.5, NumDevs = 1, Device0 = GK20A Result = PASS