粗暴解决因ubuntu 18.04因内核升级导致的NVIDIA显卡驱动失效

粗暴解决因ubuntu 18.04因内核省级导致的NVIDIA显卡驱动失效
有一天电脑开机之后发现显示屏分辨率不对,结果一看系统信息发现显卡找不到了,再使用nvidia-smi查看显卡驱动果然打不开了.
以前出现过这种问题,好像是通过重装对应内核版本的dkms来解决,但是这次我发现dkms并没有问题,
sudo apt-get install dkms
安装信息如下:
Reading package lists... Done
Building dependency tree       
Reading state information... Done
dkms is already the newest version (2.3-3ubuntu9.7).
The following packages were automatically installed and are no longer required:
  libfcitx-core0 libfcitx-qt0 libfcitx-qt5-1 libgettextpo0 liblua5.2-0 libmng2
  libpresage-data libpresage1v5 libqt4-dbus libqt4-declarative libqt4-network
  libqt4-script libqt4-sql libqt4-sql-mysql libqt4-xml libqt4-xmlpatterns
  libqtcore4 libqtdbus4 libqtgui4 linux-headers-5.4.0-132-generic
  linux-hwe-5.4-headers-5.4.0-120 linux-hwe-5.4-headers-5.4.0-121
  linux-hwe-5.4-headers-5.4.0-122 linux-hwe-5.4-headers-5.4.0-124
  linux-hwe-5.4-headers-5.4.0-126 linux-hwe-5.4-headers-5.4.0-128
  linux-hwe-5.4-headers-5.4.0-131 linux-hwe-5.4-headers-5.4.0-132
  linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-77
  linux-image-5.4.0-121-generic linux-image-5.4.0-122-generic
  linux-image-5.4.0-124-generic linux-image-5.4.0-126-generic
  linux-image-5.4.0-128-generic linux-image-5.4.0-131-generic
  linux-image-5.4.0-132-generic linux-modules-5.4.0-121-generic
  linux-modules-5.4.0-122-generic linux-modules-5.4.0-124-generic
  linux-modules-5.4.0-126-generic linux-modules-5.4.0-128-generic
  linux-modules-5.4.0-131-generic linux-modules-5.4.0-132-generic
  linux-objects-nvidia-470-5.4.0-121-generic
  linux-objects-nvidia-470-5.4.0-122-generic
  linux-objects-nvidia-470-5.4.0-124-generic
  linux-objects-nvidia-470-5.4.0-126-generic
  linux-objects-nvidia-470-5.4.0-128-generic
  linux-objects-nvidia-470-5.4.0-131-generic
  linux-objects-nvidia-470-5.4.0-132-generic
  linux-signatures-nvidia-5.4.0-121-generic
  linux-signatures-nvidia-5.4.0-122-generic
  linux-signatures-nvidia-5.4.0-124-generic