重新安装显卡驱动后，重新make caffe ：sudo make runtest ，时出现问题：

check Failed:error == cudaSuccess(30VS.0)unkown error...

1. 卸载原cuda

sudo /usr/local/cuda-8.0/bin/uninstall-cuda-8.0.pl

2. 重新安装cuda

3.出现问题：

/usr/bin/ld: 找不到 -lglut collect2:

error: ld returned 1 exit status

解决方法：

         http://blog.csdn.net/abclixu123/article/details/46571985
         sudo apt-get install libgl1-mesa-dev
          sudo apt-get install libglu1-mesa-dev
          sudo apt-get install libglut-dev  or  sudo apt-get install freeglut3-dev

4. 进入samples/bin/x86_64/linux/release,sudo下运行deviceQuery时

.......

cudaGetDeviceCount returned 30 -> unknown

error Result = FAIL

解决方法：http://blog.csdn.net/tcorpion/article/details/52741836

apt-get remove nvidia-340