some more info
$ dpkg -l | grep nvidia
ii nvidia-331 340.76-0ubuntu0.1 amd64 Transitional package for nvidia-331
ii nvidia-331-uvm 340.76-0ubuntu0.1 amd64 Transitional package for nvidia-340-uvm
ii nvidia-340 340.76-0ubuntu0.1 amd64 NVIDIA binary driver - version 340.76
ii nvidia-340-uvm 340.76-0ubuntu0.1 amd64 Transitional package for nvidia-340
rc nvidia-346 346.46-0ubuntu1 amd64 NVIDIA binary driver - version 346.46
ii nvidia-cuda-dev 5.5.22-3ubuntu1 amd64 NVIDIA CUDA development files
ii nvidia-cuda-doc 5.5.22-3ubuntu1 all NVIDIA CUDA and OpenCL documentation
ii nvidia-libopencl1-331 340.76-0ubuntu0.1 amd64 Transitional package for nvidia-libopencl1-340
ii nvidia-libopencl1-340 340.76-0ubuntu0.1 amd64 NVIDIA OpenCL Driver and ICD Loader library
ii nvidia-modprobe 346.46-0ubuntu1 amd64 Load the NVIDIA kernel driver and create device files
ii nvidia-opencl-dev:amd64 5.5.22-3ubuntu1 amd64 NVIDIA OpenCL development files
ii nvidia-opencl-icd-331 340.76-0ubuntu0.1 amd64 Transitional package for nvidia-opencl-icd-340
ii nvidia-opencl-icd-340 340.76-0ubuntu0.1 amd64 NVIDIA OpenCL ICD
ii nvidia-prime 0.6.2 amd64 Tools to enable NVIDIA's Prime
ii nvidia-profiler 5.5.22-3ubuntu1 amd64 NVIDIA Profiler for CUDA and OpenCL
ii nvidia-settings 346.46-0ubuntu1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-visual-profiler 5.5.22-3ubuntu1 amd64 NVIDIA Visual Profiler
---
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
server glx extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_multisample, GLX_EXT_buffer_age,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_framebuffer_sRGB, GLX_EXT_stereo_tree, GLX_EXT_swap_control,
GLX_EXT_swap_control_tear, GLX_EXT_texture_from_pixmap,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_NV_delay_before_swap,
GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
client glx extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_import_context, GLX_EXT_stereo_tree, GLX_EXT_swap_control,
GLX_EXT_swap_control_tear, GLX_EXT_texture_from_pixmap,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_NV_copy_image,
GLX_NV_delay_before_swap, GLX_NV_float_buffer,
GLX_NV_multisample_coverage, GLX_NV_present_video, GLX_NV_swap_group,
GLX_NV_video_capture, GLX_NV_video_out, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_framebuffer_sRGB, GLX_EXT_stereo_tree, GLX_EXT_swap_control,
GLX_EXT_swap_control_tear, GLX_EXT_texture_from_pixmap,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_NV_delay_before_swap,
GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GT 740M/PCIe/SSE2
OpenGL core profile version string: 4.3.0 NVIDIA 340.76
OpenGL core profile shading language version string: 4.30 NVIDIA via Cg compiler
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
GL_AMD_multi_draw_indirect, GL_AMD_seamless_cubemap_per_texture,
GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility,
GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_bindless_texture,
GL_ARB_blend_func_extended, GL_ARB_buffer_storage,
GL_ARB_clear_buffer_object, GL_ARB_clear_texture,
GL_ARB_color_buffer_float, GL_ARB_compressed_texture_pixel_storage,
...
OpenGL version string: 4.4.0 NVIDIA 340.76
OpenGL shading language version string: 4.40 NVIDIA via Cg compiler
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL extensions:
...