I can confirm this! This is also my 1st post.
I use a ps3 controller and i have no trouble with insert coin since i changed:
input_enable_hotkey_btn = "16"
16 is the PS button, so i doesn’t conflict with select.
I also have no problems with my bluetooth dongle or pairing my ps3 controllers.
no problems with lr-imame4all
no problems with lr-mupen64plus
no problems with lr-pcsx-rearmed
no problems with lr-snes9x-next
The shortcut PS Button + Start can quit this 4 emulators, but when I load a game in lr-fba I have to ssh into it to reboot the system since neither the keyboard nor the controllers work.
If anyone can identify the problem please enlighten us!