No, I mean, does the gamepad work as a gamepad? or as an IME
I’ve not had it long and not used it as a gamepad, sorry: I would hope so, as that’s why I bought it. Like the DS3, it works for input selection on the RA menus (and everywhere else on my S4 in Touchwiz), just not in RGUI.
To confirm: exact same behaviour on the DS2 with usb adapter as seen on both the DS3 and generic snes pad, so that’s all 3 controllers affected.
On a separate matter, I don’t understand why I get ‘N/A’ on all ports and can only see ‘RetroPad / RetroKeyBoard’ under bind mode and device type in User 1 Device Index; I noticed no core details visible either, even when dropping back into RGUI in the middle of a game. Am assuming all this is normal with the nightly builds, as the input device lists and core details were visible to me on the play store version.
FIXED! 
Nightly build 26.02.15 working on my JB S4.
woohoo! Thanks for testing 3miliooo