pve8-lxc音画直通HDMI VGA输出系列：键鼠篇之input/by-id方式（推荐）

重要提醒

警告⚠：如果在lxc中的键盘鼠标没有反馈，而且也完成了event测试确实有输出的，请重启宿主机，或者更换USB键盘进行测试。在我的设备上，我的无线键鼠在拔出再插入时，需要等相当一段时间，才会被检测到。

警告⚠：总体来说，我建议使用usb键盘完成简单的测试，再进行更复杂的绑定操作。

警告⚠：在lxc中，绑定对应的event、id时，名称不可以太长，任意名称都是可以的

警告⚠：lxc可能由于启动先后顺序问题，无法直接加载声卡和键鼠必要信息，因此需要手动操作

绑定原理

有event、id、usb透传三种方式。本文介绍input/by-id。这也是我推荐使用的方式。

宿主机查组

宿主机查询键鼠情况，发现设备的用户是root，归属于input组

ls -l /dev/input/
root@pve:~# ls -l /dev/input/
total 0
drwxr-xr-x 2 root root 140 Mar 3 06:58 by-id
drwxr-xr-x 2 root root 160 Mar 3 06:58 by-path
crw-rw---- 1 root input 13, 64 Mar 3 06:58 event0
crw-rw---- 1 root input 13, 65 Mar 3 06:58 event1
crw-rw---- 1 root input 13, 74 Mar 3 06:58 event10
crw-rw---- 1 root input 13, 75 Mar 3 06:58 event11
crw-rw---- 1 root input 13, 76 Mar 3 06:58 event12
crw-rw---- 1 root input 13, 66 Mar 3 06:58 event2
crw-rw---- 1 root input 13, 67 Mar 3 06:58 event3
crw-rw---- 1 root input 13, 68 Mar 3 06:58 event4
crw-rw---- 1 root input 13, 69 Mar 3 06:58 event5
crw-rw---- 1 root input 13, 70 Mar 3 06:58 event6
crw-rw---- 1 root input 13, 71 Mar 3 06:58 event7
crw-rw---- 1 root input 13, 72 Mar 3 06:58 event8
crw-rw---- 1 root input 13, 73 Mar 3 06:58 event9
crw-rw---- 1 root input 13, 63 Mar 3 06:58 mice
crw-rw---- 1 root input 13, 32 Mar 3 06:58 mouse0

宿主机查询

root@pve:~# ls /dev/input/by-id/
usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-if01
usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-mouse
usb-RAPOO_Rapoo_2.4G_Wireless_Device-if02-event-kbd
usb-RAPOO_Rapoo_2.4G_Wireless_Device-mouse

查LXC中组GID

在LXC中查询对应组GID

l@CT101:~$ getent group input
input:x:101:

LXC配置

所以LXC配置中添加

dev2: /dev/input/event3,gid=101
dev2: /dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-if01,gid=101
dev3: /dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-mouse,gid=101
dev4: /dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-if02-event-kbd,gid=101
dev5: /dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-mouse,gid=101

LXC中验证权限

权限归属与宿主机一致，无问题。

l@CT101:~$ ls /dev/input/by-id/
usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-if01
usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-mouse
usb-RAPOO_Rapoo_2.4G_Wireless_Device-if02-event-kbd
usb-RAPOO_Rapoo_2.4G_Wireless_Device-mouse

lxc接受事件

需要在lxc中接受事件。我猜测是启动顺序问题，设备事件无法正确被映射，需要手动定义。
这里再强调一遍，像RAPOO Rapoo 2.4G Wireless Device System Control这种名称，太长了没有必要直接抄，抄了就识别不到！！！请改为几个单词或任意几个字符即可

你要调整的是Identifier “Rapoo 2.4G Wireless Device”，不是Option “Device” “/dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-if01”

写错就是为了防止你直接抄。

root@CT101:~# apt install xserver-xorg-input-evdev -y
root@CT101:~# nano /etc/X11/xorg.conf.d/10-evdev.conf
Section "InputDevice"
    Identifier "Rapoo 2.4G Wireless Device"
    Option "Device" "/dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-if01"
    Option "AutoServerLayout" "true"
    Driver "evdev"
EndSection

Section "InputDevice"
    Identifier "Rapoo 2.4G Wireless Device"
    Option "Device" "/dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-event-mouse"
    Option "AutoServerLayout" "true"
    Driver "evdev"
EndSection

Section "InputDevice"
    Identifier "Rapoo 2.4G Wireless Device"
    Option "Device" "/dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-if02-event-kbd"
    Option "AutoServerLayout" "true"
    Driver "evdev"
EndSection

Section "InputDevice"
    Identifier "Rapoo 2.4G Wireless Device"
    Option "Device" "/dev/input/by-id/usb-RAPOO_Rapoo_2.4G_Wireless_Device-mouse"
    Option "AutoServerLayout" "true"
    Driver "evdev"
EndSection

重启xorg

root@CT101:~# systemctl restart lightdm

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