Background Input for WGInput controllers not working

[grazy9999]

With Dolphin Release 5.0-16793 it is possible to use a controller as a WGInput device. This allows e.g. more than 4 Xbox One controllers to be recognized by Dolphin and linked to controller slots.     
My problem now is that the option "Background Input" under Controller settings      does not seem to work with WGInput devices.
When I use controllers as XInput devices, I can operate 2 Dolphin instances in parallel even if only one of the two windows is in focus/foreground. As soon as I change the controller to WGInput the parallel operation does not work anymore.

Does anyone know a solution for this?
I want to work with 8 controllers on several different dolphin instances in parallel.

Thanks for any advice
grazy

[AdmiralCurtiss]

This unfortunately appears to be a limitation of Windows.Gaming.Input itself -- there's a post from a Valve developer explaining that's why they don't use WGInput for Xbox controllers and are thus also limited to 4 controllers. We'd need to petition to Microsoft to change this.

[mbc07]

Steam nowadays can use up to 16 Xbox controllers on Windows, but they're not using WGInput. You have to enable an option on Big Picture settings and that installs a custom driver, you even need to reboot the PC the first time you enable the option...

[grazy9999]

Thanks a lot for the feedback.
@mbc07 this feature of steam (parallel use of 16 XInput devices) can not be used with dolphin I guess?

[mbc07]

AFAICT Valve ships only a driver binary, so no...

[grazy9999]

Too bad. Maybe this will be a feature of dolphin in the future...
Thanks for the reply anyway.