mirror of
https://github.com/PhyllomeOS/wiki.git
synced 2024-07-08 10:45:47 +00:00
60 lines
1.9 KiB
Markdown
60 lines
1.9 KiB
Markdown
---
|
||
title: Share an input device with a guest using evdev
|
||
description:
|
||
published: true
|
||
date: 2023-05-13T15:58:27.426Z
|
||
tags:
|
||
editor: markdown
|
||
dateCreated: 2022-08-13T00:26:02.801Z
|
||
---
|
||
|
||
# Share an input device
|
||
|
||
In this section, we focus on sharing a locally attached input device with a guest virtual machine.
|
||
|
||
## Evdev event device
|
||
|
||
Since version 7.4.0, Libvirt added a low-latency local-only way to share an input device with a guest, using the [Linux evdev event interface](https://www.kernel.org/doc/html/latest/input/input.html?highlight=evdev#evdev).
|
||
|
||
- List input devices based on their identification, only listing those with an *event* in their name and excluding these with *if*:
|
||
|
||
```
|
||
ls /dev/input/by-id/* | grep event | grep -v if
|
||
```
|
||
|
||
```
|
||
/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 registring its inputs in the console:
|
||
|
||
```
|
||
cat /dev/input/by-id/usb-Logitech_G513_RGB_MECHANICAL_GAMING_KEYBOARD_156930783132-event-kbd
|
||
```
|
||
|
||
- Clicking or typing on the device you wish to share should display gibberish characters on the 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
|
||
```
|
||
|
||
- Add the following snippet to the XML domain definition of an existing virtual machine, 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>
|
||
```
|
||
|
||
> 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
|
||
|