I came across this (http://forum.retrode.org/index.php?topic=333.0) thread indicating a patch was happening to allow multiple controllers to be recognized properly in Linux, did this make it out anywhere? My Retrode 2 shipped with the 0.20 firmware, but I'm seeing all controllers as one device.
I'm also seeing references to 0.23* firmware on the forum, but only seeing up to 0.19 available on retrode.org. Where can I find the current firmware repository? Thanks!
Since Linux kernel version 4.12, it should work correctly automatically.
http://www.hadess.net/2017/07/gaming-hardware-support.html
See my comments on this thread as well: http://forum.retrode.org/index.php/topic,366.0.html as well.