n卡掉驱动处理

解决Ubuntu系统更新后N卡掉驱动的问题

1 卸载已安装驱动

首先需要卸载所有和n卡有关的系统安装

sudo apt --purge remove "*cuda*" "*cublas*" "*cufft*" "*cufile*" "*curand*" "*cusolver*" "*cusparse*" "*gds-tools*" "*npp*" "*nvjpeg*" "nsight*" "*nvvm*"
sudo apt purge "*nvidia*" "libxnvctrl*"
sudo apt autoremove --purge -V

2 停用相关程序

首先检查一下内核的情况：

sudo lsmod | grep nvidia

可能会看到类似这样的内容：

nvidia_uvm           2162688  0
nvidia_drm            131072  0
nvidia_modeset       1716224  3 nvidia_drm
nvidia              11628544  11 nvidia_uvm,nvidia_modeset
video                  77824  1 nvidia_modeset
ecc                    45056  1 nvidia

此时可以具体查看一下那些程序仍然在使用N卡：

sudo lsof /dev/nvidia*

比如我这里就有一些和N卡持久化的进程在占用：

COMMAND      PID                USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
nvidia-pe 113901 nvidia-persistenced    2u   CHR 195,255      0t0 1209 /dev/nvidiactl
nvidia-pe 113901 nvidia-persistenced    3u   CHR   195,0      0t0 1210 /dev/nvidia0
nvidia-pe 113901 nvidia-persistenced    5u   CHR   195,0      0t0 1210 /dev/nvidia0
nvidia-pe 113901 nvidia-persistenced    6u   CHR   195,0      0t0 1210 /dev/nvidia0
nvidia-pe 113901 nvidia-persistenced    7u   CHR 195,254      0t0 1214 /dev/nvidia-modeset
nvidia-pe 113901 nvidia-persistenced    8u   CHR   195,0      0t0 1210 /dev/nvidia0
nvidia-pe 113901 nvidia-persistenced    9u   CHR   195,1      0t0 1211 /dev/nvidia1
nvidia-pe 113901 nvidia-persistenced   10u   CHR   195,1      0t0 1211 /dev/nvidia1
nvidia-pe 113901 nvidia-persistenced   11u   CHR   195,1      0t0 1211 /dev/nvidia1
nvidia-pe 113901 nvidia-persistenced   12u   CHR 195,254      0t0 1214 /dev/nvidia-modeset
nvidia-pe 113901 nvidia-persistenced   13u   CHR   195,1      0t0 1211 /dev/nvidia1

根据不同情况，停掉相应的进程（比如用systemctl或者其它的方式），然后卸载内核：

sudo modprobe -r nvidia_modeset
sudo modprobe -r nvidia

然后就可以重新安装了