Recalbox with two USB splitters/Hubs
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I am using Recalbox 6.1, and I have a Raspberry Pi 3 B+ in a Megapi case, four official Sega USB controllers, and a 3 amp power supply. I use splitters from Amazon to connect all four controllers into the two front USB ports.
https://www.amazon.com/gp/product/B07MHYVVZ8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
When I install Retropie on an SD card and boot it up I can configure all four, and all four work. But when I use Recalbox I only need to configure one of them, and the others work. But if I plug all four into the splitters I only get two (one from each) working. I did a jstest and it only shows one controller connected to the splitter. Is there any way to make all four visible when using the splitters, as Retropie does?