我有一台 Ubunutu 18.04 机器，上周末它（目前莫名其妙地 - 自动更新？）重启了。重启后，USB 键盘和鼠标无法使用。也就是说，没有显示按键，也没有灯（数字锁）亮起。我试过多个键盘。
dmesg好像
sudo dmesg | grep -iFe usb | tail -n20
[50732.262444] input: Dell Dell USB Entry Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.0/0003:413C:2107.000D/input/input18
[50732.322187] hid-generic 0003:413C:2107.000D: input,hidraw0: USB HID v1.10 Keyboard [Dell Dell USB Entry Keyboard] on usb-0000:03:00.0-1/input0
[59359.006009] usb 1-1: USB disconnect, device number 8
[59418.834675] usb 1-1: new low-speed USB device number 9 using xhci_hcd
[59419.015970] usb 1-1: New USB device found, idVendor=413c, idProduct=2113
[59419.015974] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[59419.015977] usb 1-1: Product: Dell KB216 Wired Keyboard
[59419.023482] input: Dell KB216 Wired Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.0/0003:413C:2113.000E/input/input19
[59419.082807] hid-generic 0003:413C:2113.000E: input,hidraw0: USB HID v1.11 Keyboard [Dell KB216 Wired Keyboard] on usb-0000:03:00.0-1/input0
[59419.087396] input: Dell KB216 Wired Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.1/0003:413C:2113.000F/input/input20
[59419.146696] hid-generic 0003:413C:2113.000F: input,hidraw1: USB HID v1.11 Device [Dell KB216 Wired Keyboard] on usb-0000:03:00.0-1/input1
[60593.694511] usb 1-1: USB disconnect, device number 9
表示USB已被识别（最后断开的是我的键盘）。
lsblk就好像
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 2.3M 1 loop /snap/gnome-calculator/238
loop1 7:1 0 87.9M 1 loop /snap/core/5742
loop2 7:2 0 42.1M 1 loop /snap/gtk-common-themes/701
loop3 7:3 0 13M 1 loop /snap/gnome-characters/139
loop4 7:4 0 34.2M 1 loop /snap/gtk-common-themes/808
loop5 7:5 0 87.9M 1 loop /snap/core/5662
loop6 7:6 0 88.2M 1 loop /snap/core/5897
loop7 7:7 0 140.9M 1 loop /snap/gnome-3-26-1604/70
loop8 7:8 0 140.7M 1 loop /snap/gnome-3-26-1604/74
loop9 7:9 0 3.7M 1 loop /snap/gnome-system-monitor/57
loop10 7:10 0 34.6M 1 loop /snap/gtk-common-themes/818
loop11 7:11 0 14.5M 1 loop /snap/gnome-logs/45
loop12 7:12 0 13M 1 loop /snap/gnome-characters/124
loop13 7:13 0 14.5M 1 loop /snap/gnome-logs/43
loop14 7:14 0 2.3M 1 loop /snap/gnome-calculator/260
sda 8:0 0 15.3T 0 disk /data
nvme0n1 259:0 0 1.8T 0 disk /databases
nvme1n1 259:1 0 1.8T 0 disk
├─nvme1n1p1 259:2 0 776.6G 0 part /
├─nvme1n1p2 259:3 0 1K 0 part
└─nvme1n1p5 259:4 0 1011.9G 0 part [SWAP]
$ lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 003: ID 0557:2419 ATEN International Co., Ltd
Bus 005 Device 002: ID 0557:7000 ATEN International Co., Ltd Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 011: ID 413c:2107 Dell Computer Corp.
Bus 001 Device 010: ID 413c:2113 Dell Computer Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
底部的两个戴尔选项都是键盘。
我以前从未遇到过这种情况，我不知道该怎么办。有什么想法吗？
我能够通过 ssh 进入 IP 地址，而且一切似乎都正常工作。
答案1
就 Numlock 而言，我遇到了同样的问题，并在终端中执行了此操作。
sudo apt install numlockx （然后）numlockx on
其余的事情我帮不了，抱歉