使用 Lubuntu (18.x) 重新启动我的笔记本电脑后，我感到非常惊讶。我的键盘和鼠标停止工作。首先，我插入了外部键盘和鼠标，但它们也不起作用。所以我想这是相当软件问题。
我遵循了这个主题的步骤：从 16.04 更新到 16.10；进入锁定屏幕后键盘和鼠标不再工作
但不幸的是，它对我没有帮助。
我专注于这个答案：
I had the same issue today and found this bug report.
The problem seems to be, that during update process they forget to install/update the package `xserver-xorg-input-all`!
So these instructions worked for me on my thinkpad p51s notebook with a little modification:
Press a Shift key during boot to get the GRUB menu.
In GRUB, select Advanced Options, then the first kernel with the recovery mode.
Select "Network" to get network access (needed for package installation)
Select "Drop to root shell"
Press Enter to confirm.
On my system not needed because, the filesystem was mounted rw, but if needed then mount -o rw,remount /.
Install the needed package: apt install xserver-xorg-input-all (and the message that they need to uninstall 16.04 packages!)
Press Ctrl+D to leave the root shell.
Select resume boot from the menu.
Now I could only log into console.
sudo reboot
After reboot my ThinkPad's mouse and keyboard and the external mouse and keyboard worked fine!
但正如该用户所说，我没有看到相同的选项。现在，我正在准备使用 Lubuntu 20 的可启动 USB，但基本上留在当前的 Lubuntu 上会很舒服，而不是从一开始就浪费数小时配置操作系统。
