ubuntu上のcheeseで、デバイスが見つかりませんのエラーは

sudo apt-get install libsbigudrv2 libsbigudrv0
sudo reboot

したら、解決した。

下記の記事の中の対策を試していたら、自分の場合は上記だった。

https://askubuntu.com/questions/461657/integrated-webcam-not-detected-after-update-to-14-04

s I had encountered errors when I tried to install cupy,on Ubuntu 18.04

I upgrade cudnn. Then I succeeded installation of cupy.

The following is a notes on the procedure.

1. after uninstallation of existing pip, reinstall pip

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py -user -vv
python get-pip.py -user -vv

2. install a recent cuda-toolkit

2-1. download the cuda toolkit from https://developer.nvidia.com/cuda-toolkit-archive

2.2 install cuda-toolkit
sudo dpkg -i cuda-repo-ubuntu1804-10-0-local-10.0.130-410.48_1.0-1_amd64.deb
sudo apt-key add /var/cuda-repo-10-0-local-10.0.130-410.48/7fa2af80.pub
sudo apt-get update

sudo apt-get install cuda

3. install cudnn
   3-1 download packages for ubuntu18.04 from https://developer.nvidia.com/rdp/cudn
   n-download

3-2. install cudnn packages
sudo dpkg -i libcudnn7_7.3.1.20-1+cuda10.0_amd64.deb
sudo dpkg -i libcudnn7-dev_7.3.1.20-1+cuda10.0_amd64.deb
sudo dpkg -i libcudnn7-doc_7.3.1.20-1+cuda10.0_amd64.deb

3-3. replace the old cuda path with cuda-10.0 path
nano ~/.bashrc
' NVIDIA CUDA Toolkit
export PATH=/usr/local/cuda-10.0/bin:$PATH
export LD_LIBRARY_PATH=/usr/local/cuda-10.0/lib64:$LD_LIBRARY_PATH

source ~/.bashrc
echo $PATH |grep cuda

4. install cupy

pip3 install -user cupy

python3
import cupy
import cupy.cudnn

failed.
modulenotfounderror: no module named ‘cupy.cudnn’

so I did the following
pip3 uninstall cupy

set $CUDA_PATH as /usr/local/cuda

pip3 -v install -user cupy -no-cache-dir

python3
import cupy
import cupy.cudnn

No error.

I encountered black screen when login after ubuntu upgrade from 17.10 to 18.04

My tentative solution has been the following.

sudo apt install nvidia-cuda-toolkit
sudo apt install clinfo
sudo apt-add-repository ppa:graphics-drivers/ppa
sudo apt update
sudo apt upgrade
sudo reboot
nvidia-smi
clinfo

sudo apt install lightdm
(choose lightdm)
; countermeasurea black screen
sudo reboot

ubuntu 17.10でcuda8.0, nvidia-284でGNUバージョンエラーと/usr/bin/ld: cannot find-lnvcuvidエラー

NVIDIA_CUDA-8.0_Samplesでsampleをmakeしようとすると２種類のエラー発生したのでその対策

１．GNUバージョンエラー対策

$ sudo apt-get install gcc-4.8
$ sudo apt-get install g++-4.8
$ sudo update-alternatives ?install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20
$ sudo update-alternatives ?install /usr/bin/g++ g++ /usr/bin/g++-4.8 20

2. /usr/bin/ld: cannot find -lnvcuvidエラー対策

$ sudo cp /usr/lib/nvidia-384/libnvcuvid.so /usr/local/cuda-8.0/lib64
$ sudo cp /usr/lib/nvidia-384/libnvcuvid.so.1 /usr/local/cuda-8.0/lib64

これでsampleがmakeできる様になり動かせた。