no CUDA-capable device is detected

[ake Jixun]

After make and make test successfully.  Got the following error by "make runtest"

.build_release/test/test_all.testbin 0 --gtest_shuffle
Cuda number of devices: 0  (which should be > 0)
Setting to use device 0
Current device id: 0
E0127 13:16:08.212196  3228 common.cpp:91] Cannot create Cublas handle. Cublas won't be available.
E0127 13:16:08.213647  3228 common.cpp:98] Cannot create Curand generator. Curand won't be available.


E0127 13:16:08.213647  3228 common.cpp:98] Cannot create Curand generator. Curand won't be available.

Environment: ubuntu 14.04
CPU: i3 4150
GPU: GTX 970 graphics card
 In the BIOS i set the primary gpu as iGPU(integrated in cpu).

GPU driver installation:
sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get install nvidia-346

CUDA toolkit is from https://developer.nvidia.com/cuda-downloads-geforce-gtx9xx#linux
cuda-linux64-rel-6.5.19-18849900.run extracted.

There is no items in /dev/, which should be /dev/nvidia*
But by  command "lspci |grep 'VGA'"
00:02.0 VGA compatible controller: Intel Corporation Device 041e (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 13c2 (rev a1)

I don't know if it's necessary to set the gtx970 as the primary gpu for display, or should i
install a different gpu driver?

Could anyone help me with it!

[Evan Shelhamer]

Don't install the NVIDIA driver by apt-get; instead, install the latest driver from NVIDIA as detailed in the installation instructions.

If the device doesn't exist, this is a GPU / Linux install issue and not a Caffe problem. The driver is too old to recognize the GTX 970.

Try again once the device is recognized by Ubuntu.

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