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title | description | published | date | tags | editor | dateCreated |
---|---|---|---|---|---|---|
Share an input device with a guest using evdev | true | 2023-02-08T19:09:51.570Z | markdown | 2022-08-13T00:26:02.801Z |
Share an input device
In this section, we focus on sharing a device locally.
Event device
Libvirt offers a very low-latency way to share an input device device with a local virtual machine, using the linux evdev event interface.
Event device or simply evdev
is a generic input event interface that is part of the Linux kernel.
The following is an XML snippet example for sharing a mouse and a keyboard.
<input type='evdev'>
<source dev='/dev/input/by-path/platform-i8042-serio-1-event-mouse/'>
</input>
<input type='evdev'>
<source dev='/dev/input/by-path/platform-i8042-serio-0-event-kbd' grab='all' repeat='on'/>
</input>
Replace the platform-i8042-serio-1-event-mouse
value with the value under /dev/input/by-path/*
or /dev/input/by-id/*
If there are multiple possible options, the input device has to have event
in the name.
# cat /dev/input/by-path/pci-0000:09:00.0-event-mouse
<EFBFBD><EFBFBD>c $
<0A><>c<EFBFBD><63><EFBFBD>c<EFBFBD><63><EFBFBD>c<EFBFBD>$<24><>c<EFBFBD>$<24><>c<63><D78F>c<63><D78F>c
Virtio-input
Input grabbing on Wayland doesn't currently work as expected using Spice or VNC. Destkop environments based on the X session manager may work better. {.is-warning}