I am new to Ubuntu and this is 2nd day of me struggling with this system/problem, including damaging my Ubuntu installation and having to start over, so I really hope someone can provide a working solution. I installed Ubuntu only because I need to use it with Nvidia CUDA Toolkit 7.5 from https://developer.nvidia.com/cuda-downloads After I download it and follow instructions, 'sudo apt-get update' gives me such error message:
W: file:///var/cuda-repo-7-5-local/Release.gpg: Signature by key 889BEE522DA690103C4B085ED88C3D385C37D3BE uses weak digest algorithm (SHA1)
E: Failed to fetch file:/var/cuda-repo-7-5-local/Release No Hash entry in Release file /var/lib/apt/lists/partial/_var_cuda-repo-7-5-local_Release which is considered strong enough for security purposes
I tried both solutions from How can I force 16.04 to add a repository even if it isn't considered secure enough? and nonoe of them worked, but I am not permitted to post comments there.
The first solution suggesting to download 'cuda_7.5.18_linux.run' failed miserably and destroyed my Ubuntu, as the driver couldn't be installed without stopping X server and blacklisting Nouveau (for which I also had to fish for instructions on Google). After finally seemingly 'successfully' installing the Nvidia driver, Ubuntu went into endless login loop (Ubuntu gets stuck in a login loop) and I had to reinstall it.
The 2nd suggested solution to alter "/var/cuda-repo-7-5-local/Release" also didn't work as the SHA256 posted there seems to be wrong. I'd greatly appreciate a working solution before I run out of monitors I'm throwing at the wall.
