Keras with TensorFlow backend not using GPU

Question

I built the gpu version of the docker image https://github.com/floydhub/dl-docker with keras version 2.0.0 and tensorflow version 0.12.1. I then ran the mnist tutorial https

Answer 1

I had similar kind of issue - keras didn't use my GPU. I had tensorflow-gpu installed according to instruction into conda, but after installation of keras it simply not listed GPU as available device. I've realized that installation of keras adds tensorflow package! So I had both tensorflow and tensorflow-gpu packages. I've found that there is keras-gpu package available. After complete uninstallation of keras, tensorflow, tensorflow-gpu and installation of tensorflow-gpu, keras-gpu the problem was solved.