Installing CUDA-8.0 on Ubuntu 16.04 with Nvidia GeForce 845m - Ask Ubuntu

after having installed nvidia driver 367 typing:

sudo add-apt-repository ppa:graphics-drivers/ppa -y sudo apt-get update sudo apt-get install nvidia-367 -y 

and disabled secure boot in uefi (bios) settings, i'm trying install nvidia-cuda 8.0.

these steps (following this guide):

1. from https://developer.nvidia.com/cuda-downloads downloaded cuda_8.0.44_linux.run
2. sudo mkdir /usr/local/cuda-8.0
3. sudo ./cuda_8.0.44_linux.run --override
4. in /etc/profile.d/cuda.sh: export path=$path:/usr/local/cuda/bin
5. in /etc/ld.so.conf.d/cuda.conf: /usr/local/cuda/lib64
6. sudo ldconfig
7. force cuda work gcc 5, commenting line 119 out in usr/local/cuda/include/host_config.h: //#error -- unsupported gnu version! gcc versions later 5 not supported!
8. rsync -av /usr/local/cuda/samples in cuda_samples/
9. sudo glpath=/usr/lib make

however, when type:

./nbody -benchmark -numbodies=256000 

in samples/bin/x86_64/linux/release, message:

error: 0 devices available, 1 requested. exiting.

any help?

i partially solved way:

1. sudo apt-get --purge remove nvidia-*
2. sudo service lightdm stop
3. download nvidia driver nvidia-linux-x86_64-367.57.run website
4. sudo ./nvidia-linux-x86_64-367.57.run --no-opengl-files
5. sudo ./cuda_8.0.44_linux.run (you should not install own nvidia-driver 367.48, have 367.57 installed)
6. in /usr/local/cuda-8.0/include/host_config.h, comment line out: #error -- unsupported gnu version! gcc versions later 5 not supported!
7. mkdir cuda_samples
8. rsync -av /usr/local/cuda/samples .
9. glpath=/usr/lib make
10. reboot

and cuda-8.0 enabled!

caveat: got nvidia driver website, nvidia-settings doesn't work. trying figure out how make nvidia-settings work.