mirror of
https://github.com/PhyllomeOS/wiki.git
synced 2024-07-03 00:12:40 +00:00
79 lines
2.4 KiB
Markdown
79 lines
2.4 KiB
Markdown
---
|
||
title: Share an input device with a guest using evdev
|
||
description:
|
||
published: true
|
||
date: 2024-05-15T19:20:21.209Z
|
||
tags:
|
||
editor: markdown
|
||
dateCreated: 2022-08-13T00:26:02.801Z
|
||
---
|
||
|
||
# Share an input device
|
||
|
||
In this section, we'll explore how to share a locally attached input device with a guest virtual machine.
|
||
|
||
## With evdev
|
||
|
||
As of libvirt version 7.4.0, the [Linux evdev event interface](https://www.kernel.org/doc/html/latest/input/input.html?highlight=evdev#evdev) can be used to share an input device physically attached to the host with a guest, in a low-latency manner.
|
||
|
||
### Preparation
|
||
|
||
Before sharing an input device, follow these steps:
|
||
|
||
- List available input devices on your host system, excluding those containing `if` in their name, including those containing `event` in their name:
|
||
|
||
```
|
||
ls /dev/input/by-id/* | grep event | grep -v if
|
||
```
|
||
|
||
This command should output the names of eligible devices.
|
||
|
||
Example output:
|
||
|
||
```
|
||
/dev/input/by-id/usb-Corsair_CORSAIR_HARPOON_RGB_PRO_Gaming_Mouse_1902B02BAF5E04655DEB612AF5001C05-event-mouse
|
||
/dev/input/by-id/usb-Logitech_G513_RGB_MECHANICAL_GAMING_KEYBOARD_156930783132-event-kbd
|
||
/dev/input/by-id/usb-Logitech_USB_Keyboard-event-kbd
|
||
/dev/input/by-id/usb-Logitech_USB_Optical_Mouse-event-mouse
|
||
```
|
||
|
||
- Make sure that the correct one is selected by registering its inputs in your console:
|
||
|
||
```
|
||
cat /dev/input/by-id/usb-Logitech_G513_RGB_MECHANICAL_GAMING_KEYBOARD_156930783132-event-kbd
|
||
```
|
||
|
||
This step ensures you're working with the desired input device.
|
||
|
||
- Test the device by interacting with it on the host system. You should see gibberish characters displayed on your screen:
|
||
|
||
```
|
||
<EFBFBD><EFBFBD>c $
|
||
<EFBFBD><EFBFBD>c<EFBFBD><EFBFBD><EFBFBD>c<EFBFBD><EFBFBD><EFBFBD>c<EFBFBD>$<24><>c<EFBFBD>$<24><>c<63><D78F>c<63><D78F>c
|
||
```
|
||
|
||
### Adding the input device to your virtual machine
|
||
|
||
- To share the input device with your virtual machine, add the following XML snippet to its domain definition (inside the <device> section):
|
||
|
||
```
|
||
<input type='evdev'>
|
||
<source dev='/dev/input/by-id/usb-Logitech_G513_RGB_MECHANICAL_GAMING_KEYBOARD_156930783132-event-kbd' grab='all' repeat='on'/>
|
||
</input>
|
||
```
|
||
|
||
### Usage
|
||
|
||
Once the virtual machine is started, the input device will be captured by the guest system.
|
||
|
||
> Press <kbd>Left Ctrl + Right Ctrl</kbd> simultaneously to switch your devices between the guest and the host.
|
||
{.is-info}
|
||
|
||
|
||
## Resources
|
||
|
||
* https://libvirt.org/formatdomain.html#input-devices
|
||
|
||
---
|
||
|
||
*[**Go to parent page**](https://wiki.phyllo.me/)* |