Hi
As of today (2nd of February 2018) all seems to work fine after
conda install pytorch torchvision cuda90 -c pytorch
using:
conda 4.4.8
and cuda version:
nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2017 NVIDIA Corporation 
Built on Fri_Nov__3_21:07:56_CDT_2017
Cuda compilation tools, release 9.1, V9.1.85

Ubuntu:
Ubuntu 16.04.3
Python
Python 3.6.4
And I get
In [1]: import torch

In [2]: torch.cuda.is_available()
Out[2]: True

In [3]: torch.cuda.get_device_name(0)
Out[3]: 'Tesla K80'```