RuntimeError: Unexpected error from cudaGetDeviceCount(). Did you run some cuda functions before calling NumCudaDevices() that might have already set an error? Error 803: system has unsupported display driver / cuda driver combinatio 
RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {} 
解决方案如下： 
设置环境变量 
LD_LIBRARY_PATH=/lib/x86_64-linux-gnu:/usr/local/cud...