Support all input devices with X Input Extension

[iacore]

The problem you're addressing (if any)

• https://github.com/QubesOS/qubes-issues/issues/7316

• 4986

• support for game controllers

The solution you'd like

Add XInput Devices beside USB Devices to a list of devices to be attached. One input device can be attached to multiple VMs at once. By default, a filtered version of mouse and keyboard will be attached to every VM.

The value to a user, and who that user might be

• use external input device without usb passthrough
• support for multiple input devices, like multiple keyboards
• be able to play first-person games with mouse
• be able to play games using game controller

[DemiMarie]

Should this be handled through the GUI protocol?

[iacore]

Yes. This will likely be a major change to the GUI protocol, where each event has its own device id. The fake device driver need to be changed to create correct fake devices too. Besides mouse/keyboard capture, some games use controller capture (probably how XBox controller light up). Also, controller rumble is handled by X Input Extension as "actuator" or something.