I'm not sure what I'm doing wrong but I don't seem to be able to get cuda to install nicely.
I have tried using:
sudo apt-get update
sudo apt-get install nvidia-cuda-toolkit
This appears to work but I don't get a cuda-5.5 folder in /usr/local
Should I still be expecting this folder?
I have also tried installing Cuda 6.5 which is what I had previously got working before needing a fresh install.
I tried this from the deb file
sudo dpkg -i cuda..... but it fails trying to write the GPGKEY similar to: Insatlling CUDA : Failed to add GPGKEY at http://cuda-repo/repos/GPGKEY to apt keys
I have also tried the 6.5 .run file which after installation of the 340 driver and reboot Ubuntu login fails to load.
I tried following the install instruction from Nvidia but get similar issues.
I have previously installed cuda (5.5 & 6.5) on ubuntu (12 & 14) successfully and have no idea what to try next...
Any help please?