Multiple touchscreens not detected

Hi guys,

We have a setup working with 4 monitors, each with their own touchscreen. The setup works great in windows and each display correctly shows multiple-touch inputs.

As soon as we go into Unity the new Input-debugger shows only 1 Touchscreen connected. All physical touchscreens work well and the input enters the system trough this single (virtual?) Touchscreen-device.

The coordinates we receive are clamped between 0 and the max resolution of a single screen. This would be fine if we were able to figure out which Display it corresponds too.

UnityEngine.InputSystem.EnhancedTouch.screen does tell us which Touchscreen it came from but since Unity combined all four physical touchscreens into a single Touchscreen-device, we are unable to distinguish the four physical screens.

We also tried adding new Touchscreens as input-devices, but no luck there. These newly added devices simply do not receive any data and are not flagged as 'native'.

Unity does recognize 8 additional 'Unsupported' devices (see screenshot) so we tried creating Layouts for these devices and adding them as Touchscreens. Unfortunately this didn't work either.
https://prnt.sc/p88m5l

Any pointers would be much appreciated! Thanks in advance!

 

did you fix this problem?

 

Did you find a solution?