Thank you Fred, that was indeed the issue. After correcting 
CUDA_VISIBLE_DEVICES, I now get this error:

>>> import theano
Using gpu device 0: GeForce GTX 1080 (CNMeM is disabled, cuDNN 5110)
/nas/longleaf/apps/python/3.5.1/lib/python3.5/site-packages/theano/sandbox/cuda/__init__.py:600:
 
UserWarning: Your cuDNN version is more recent than the one Theano 
officially supports. If you see any problems, try updating Theano or 
downgrading cuDNN to version 5.
  warnings.warn(warn)
>>> 

I have cuDNN 5.1.10, is it saying I have to have 5.0? Do I have to use the 
bleeding-edge version of Theano for 5.1.10? I'd rather use stable version.



On Friday, February 10, 2017 at 1:19:15 PM UTC-5, nouiz wrote:
>
> Sometimes, the system make the device not usable by the user by changing 
> the permission or cgroup or the env variable: CUDA_VISIBLE_DEVICES
>
> Can you check that you can run the cuda example? To make sure if the 
> problem is in your config (what I think).
>
> Fred
>
> On Fri, Feb 10, 2017 at 8:49 AM Michael Waldron <mhwald...@gmail.com 
> <javascript:>> wrote:
>
>> I have installed the latest stable theano using 'pip install theano', 
>> however it cannot see the gpus on my system.
>>
>> >>> import theano
>> WARNING (theano.sandbox.cuda): CUDA is installed, but device gpu is not 
>> available  (error: Unable to get the number of gpus available: no 
>> CUDA-capable device is detected)
>> >>> 
>>
>> $ echo $THEANO_FLAGS
>> cuda.root=/usr/local/cuda,device=gpu,floatX=float32
>>
>> I have tried using both Python 2.7.12 and 3.5.1, same result.
>> OS RHEL 7
>> CUDA 8 is installed and the OS sees the gpus.
>>
>> $ nvcc -V
>> nvcc: NVIDIA (R) Cuda compiler driver
>> Copyright (c) 2005-2016 NVIDIA Corporation
>> Built on Sun_Sep__4_22:14:01_CDT_2016
>> Cuda compilation tools, release 8.0, V8.0.44
>>
>> $ nvidia-smi
>> Fri Feb 10 08:33:46 2017       
>>
>> +-----------------------------------------------------------------------------+
>> | NVIDIA-SMI 367.48                 Driver Version: 367.48               
>>      |
>>
>> |-------------------------------+----------------------+----------------------+
>> | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. 
>> ECC |
>> | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util 
>>  Compute M. |
>>
>> |===============================+======================+======================|
>> |   0  GeForce GTX 1080    Off  | 0000:04:00.0     Off |                 
>>  N/A |
>> | 27%   28C    P0    37W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   1  GeForce GTX 1080    Off  | 0000:05:00.0     Off |                 
>>  N/A |
>> | 27%   29C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   2  GeForce GTX 1080    Off  | 0000:08:00.0     Off |                 
>>  N/A |
>> | 27%   29C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   3  GeForce GTX 1080    Off  | 0000:09:00.0     Off |                 
>>  N/A |
>> | 27%   28C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   4  GeForce GTX 1080    Off  | 0000:85:00.0     Off |                 
>>  N/A |
>> | 27%   29C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   5  GeForce GTX 1080    Off  | 0000:86:00.0     Off |                 
>>  N/A |
>> | 27%   29C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   6  GeForce GTX 1080    Off  | 0000:89:00.0     Off |                 
>>  N/A |
>> | 27%   27C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>> |   7  GeForce GTX 1080    Off  | 0000:8A:00.0     Off |                 
>>  N/A |
>> | 27%   28C    P0    39W / 180W |      0MiB /  8113MiB |      0%     
>>  Default |
>>
>> +-------------------------------+----------------------+----------------------+
>>                                                                           
>>      
>>
>> +-----------------------------------------------------------------------------+
>> | Processes:                                                       GPU 
>> Memory |
>> |  GPU       PID  Type  Process name                               Usage 
>>      |
>>
>> |=============================================================================|
>> |  No running processes found                                             
>>     |
>>
>> +-----------------------------------------------------------------------------+
>>
>> Any assistance would be appreciated.
>>
>>
>> -- 
>>
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