小白避坑系列--Ubuntu1804 RTX3060显卡实现双屏

刚装的Ubuntu1804新系统，显卡是RTX3060，打算搞个双屏，内核是5-4-x，刚开始看网上说要升级内核，去搞了下，lib6相关依赖包版本说要2.34以上，升级了，结果把系统文件破坏了，sudo都不能用，所以升级内核一定要谨慎！！！文件备份后重装了系统，查找资料，发现只要装个系统推荐的驱动就可以用了

方法一：

1.先查看库里面的驱动：

$ ubuntu-drivers devices
WARNING:root:_pkg_get_support nvidia-driver-515: package has invalid Support PBheader, cannot determine support level
WARNING:root:_pkg_get_support nvidia-driver-515-server: package has invalid Support PBheader, cannot determine support level
WARNING:root:_pkg_get_support nvidia-driver-510: package has invalid Support PBheader, cannot determine support level
WARNING:root:_pkg_get_support nvidia-driver-510-server: package has invalid Support PBheader, cannot determine support level
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00002504sv00001462sd00008E97bc03sc00i00
vendor   : NVIDIA Corporation
driver   : nvidia-driver-515 - distro non-free
driver   : nvidia-driver-515-server - distro non-free
driver   : nvidia-driver-470-server - distro non-free
driver   : nvidia-driver-470 - distro non-free recommended
driver   : nvidia-driver-510 - distro non-free
driver   : nvidia-driver-510-server - distro non-free
driver   : xserver-xorg-video-nouveau - distro free builtin

2.下载推荐的（recommended）的驱动，此处是470

sudo ubuntu-drivers autoinstall
自动安装对应推荐的显卡驱动（安装后重启电脑）

3.重启电脑即可，查看自己的驱动版本以及支持的CUDA版本，此处是最高支持11.4

nvidia-smi

方法二：

根据方法一知道推荐的驱动之后，在软件与更新中的附加驱动直接点击加载即可