I have 7.2.1
Try ‘conda install cudnn’ and see if that takes care of the issue.
As an aside, I built a new LXC container from scratch today and it ran fine, and didn’t even give me the usual cuda error 11. No improvement in speed though. Shoutout to @willismar for the excellent LXC tutorial.
Checking ‘conda list --explicit’ on the LXC container, I have
pytorch-nightly 1.0.0.dev20181109-py3.7_cuda9.2.148_cudnn7.1.4_0
but no cudnn listed individually. My main box has
pytorch-nightly 1.0.0.dev20181019 py3.7_cuda9.0.176_cudnn7.1.2_0 and cudnn 7.2.1