I'm using Theano with pygpu.
Generally, it works well until, for reasons I still haven't managed to understand, it shows the following error once I try to import theano:
ERROR (theano.gpuarray): Could not initialize pygpu, support disabled
Traceback (most recent call last):
File "/home/poko/Software/anaconda2/lib/python2.7/site-packages/theano/gpuarray/__init__.py", line 220, in <module>
use(config.device)
File "/home/poko/Software/anaconda2/lib/python2.7/site-packages/theano/gpuarray/__init__.py", line 207, in use
init_dev(device, preallocate=preallocate)
File "/home/poko/Software/anaconda2/lib/python2.7/site-packages/theano/gpuarray/__init__.py", line 94, in init_dev
**args)
File "pygpu/gpuarray.pyx", line 651, in pygpu.gpuarray.init
File "pygpu/gpuarray.pyx", line 587, in pygpu.gpuarray.pygpu_init
GpuArrayException: cuInit: CUDA_ERROR_UNKNOWN: unknown error
If I reboot my computer, it works well again, for a while (sometimes for days..).
Now that situation is strange, given that such things either do work, or don't. I have not the faintest about what is generating the error, apart from observing from nvidia-smi that xorg and chrome do suck quite a lot of memory:
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1332 G /usr/lib/xorg/Xorg 392MiB |
| 0 2243 G cinnamon 110MiB |
| 0 4927 G ...-token=39C210A3DFA14C5D81FA629C813B843D 154MiB |
+-----------------------------------------------------------------------------+
It turned out that I can get rid of the error just by unloading nvidia_uvm module, by doing:
sudo rmmod nvidia_uvm
after which, it will be automatically reloaded.
Hope this helps should someone else incur in that problem.