ubuntu20.04安装完显卡驱动后黑屏问题解决
注：gazebo仿真中fps过低，电脑无法配置双屏等问题，均由显卡驱动造成，可参考本文重装驱动。
目录
进入修复模式卸载已装驱动
官网下载并重装驱动
进入修复模式卸载已装驱动
我开始是在 可视化软件 软件与更新 中安装的显卡驱动，并按照网上教程禁用了nouveau驱动。但在重启过程中，发现电脑黑屏，左上角有横光标闪过。
于是再次按照网上教程，按住ctrl+alt+f1-6，进入tty模式，都没反应。于是只能进入修复模式卸载已装驱动，具体操作如下：
- 重启电脑，在系统选择界面选择ubuntu advanced（高级选项），然后选择带有括号的recovery mode
- 进入之后，在白框中选择root选项并进入
- 左下角出现 Press Enter for maintenance.....，按回车Enter
- 进入命令行后，输入下面代码卸载已有驱动，然后reboot重启进入系统
apt remove --purge nvidia*卸载已有驱动后，禁用nouveau驱动。输入下面代码打开文档
sudo gedit /etc/modprobe.d/blacklist.conf在文档后面添加下面代码并保存关闭
blacklist nouveau
blacklist lbm-nouveau
options nouveau modeset=0
alias nouveau off
alias lbm-nouveau off然后更新
sudo update-initramfs -u
完成以上后，去官网下载并重装驱动
官网下载并重装驱动
1. 系统更新
sudo apt update
sudo apt upgrade -y2. 安装基础工具
sudo apt install -y build-essential cmakesudo apt install -y lightdm在弹出对话框选择"lightdm"
3. 进入英伟达官网 https://www.nvidia.cn/，找到自己显卡对应linux驱动，下载。完成后放入一个英文路径下的文件夹。路径要记住，后面要用到
4. 检查nouveau驱动是否禁用成功，输入下面代码，没有任何输出说明成功
lsmod | grep nouveau5. 进入字符界面，后续将没有图形化界面，黑屏命令行状态。
按住组合键ctrl+alt+f3（f1-f6均可）进入字符界面，先输入用户名，再输入密码
6. 关闭图形界面
sudo service lightdm stop7. 给驱动加权限
cd /home/wh //这里为驱动文件存放的英文路径
chmod 755 NVIDIA-Linux-x86_64-535.113.01.run //这里为你下载的驱动文件名，按Table键也可补全8. 输入下面代码，安装驱动
sudo ./NVIDIA-Linux-x86_64-535.113.01.run -no-x-check -no-nouveau-check9. 安装过程中一些选项的选择：
- Multiple kernel module types are available for this systems. Which would you like to use? NVIDIA Proprietary MIT/GPL
-
An alternate method of installing the NVIDIA driver was detected.(This is usually a package provided by your distributor.) A driver installed via that method may integrate better with you system than a driver installed by
naidia-installer -
Please review the message provided by the maintainer of this alternate installation method and decide how to proceed: Continue installation Abort installtion
-
The NVIDIA driver provided by Ubuntu can be installed by launching the "Software & Updates" application,and by selecting the NVIDIA driver from the "Additional Drivers" tab.
Continue installation -
Would you like to register the kernel module source with DKMS? This will allow DKMS.... Yes
-
Install NVIDIA's 32-bit compatibility libraries? NO
-
Would you like to run the nvidia-xconfig utility to automatically update you X configuration file so that the NVIDIA X driver will be used when you restart X? Any pre-existing X configuration file will be backed up.
Yes
10. 出现下面字样，说明安装成功
Your X configuration file has been successfully updated. Installation of the NVIDIA Accelerated Graphics Driver for Linux-x86_64 (version:535.113.01) is now complete.
11. 然后在命令行输入下面代码，重启。重启过程中，按f2进入bios模式，显卡设置为独立显卡，并关闭安全启动
sudo service lightdm start && reboot12. 重启电脑，安装完成。
