CUDA error: all CUDA-capable devices are busy or unavailable
我的系统ubuntu20.4，显卡3080，驱动460，cuda11.0，安装gpu版pytorch，测试后显示：RuntimeError:CUDA error: all CUDA-capable devices are busy or unavailable.
解决方法：nvidia官网下载最新的适配自己显卡的驱动，
安装教程：
https://blog.csdn.net/qq_40773561/article/details/115093692
安装中的选项：
1.The distribution-provided pre-install script failed! Are you sure you want to continue?
“Yes”
2.Would you like to register the kernel module souces with DKMS? This will allow DKMS to automatically build a new module, if you install a different kernel later?
“No”
3.Nvidia’s 32-bit compatibility libraries?
“No”
4.Would you like to run the nvidia-xconfigutility to automatically update your x configuration so that the NVIDIA x driver will be used when you restart x? Any pre-existing x confile will be backed up.
“Yes”
安装完成后，仍会回到x-server界面，此时挂载NVIDIA驱动：
modprobe nvidia
然后返回图形界面，安装cuda，cudnn
