new try 2

.travis.yml

@@ -15,10 +15,10 @@ matrix:
 
 before_install:
   - INSTALLER=cuda-repo-${UBUNTU_VERSION}_${CUDA}_amd64.deb
+  - wget http://developer.download.nvidia.com/compute/cuda/repos/${UBUNTU_VERSION}/x86_64/${INSTALLER}
   - sudo dpkg -i ${INSTALLER}
-  - sudo apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/${UBUNTU_VERSION}/x86_64/7fa2af80.pub
-  - sudo apt-get update
-  - sudo apt-get install cuda
+  - sudo apt update -qq
+  - sudo apt install -y cuda-${CUDA_SHORT/./-}
   - CUDA_HOME=/usr/local/cuda-${CUDA_SHORT}
   - LD_LIBRARY_PATH=${CUDA_HOME}/lib64:${LD_LIBRARY_PATH}
   - PATH=${CUDA_HOME}/bin:${PATH}