@Sailing_Nut i used to map "CANCEL UI" to "´select´ & ´start´" in AdvanceMAME.
This quits a game with the hotkey-combination we all know from the lr-emulators ;D

Well, the usual troubleshooting steps are

start with the RetroPie image from retropie.org.uk/download. It's a tested and mostly stock Raspbian image and the best baseline system to start experimenting. make sure you have an adequate power supply and you don't get any under-voltage warnings. test if the device is detected by the OS by running a few command line utilities # see what USB devices are connected with lsusb # see what input devices are detected by the OS and what kind (gamepad/keyboard/mouse/etc.) cat /proc/bus/input/devices test if the device inputs are registered in the system by running a few joystick/gamepad testing programs fromt the command line that capture the button/joypad/d-pad presses and show them on the terminal: # 1st joystick jstest /dev/input/js0 # 2nd joystick jstest /dev/input/js1 # another testing utility evtest

@grant2258 Aliexpress has cheap prices, if you have patience waiting for them to arrive..lol..I have bought some stuff from there for bartop I am in the process of building, but have heard mixed reviews regarding their electronics. My purchases weren't electronic related (speakers..power cord for my amp..and some purchases for my woman). Just wanted to comment about the long waits..haha.

@sturbek I dunno about turning off a USB port, but if you are using a powered hub, you could trigger that on and off via GPIO as you suggest. Nothing is built into RetroPie to do this--you're gonna have to build something from scratch.

A recent MAKE article was published with details about how to go about it with a relay:
https://makezine.com/2018/03/19/control-electronic-relays/

Well you could:

Open the retroarch.cfg file of the emulator you're using and see if there is any button configuration in the file.

Open the joystick configuration file of your controller and see if the key ID of the button down isn't being used by an another variable.

The button could simple be broken.

So just to confirm, this is still not working?

I have the same exact setup and the issue I am having is my button mapping changes for player 1 but not player 2. Player 2 is working perfect.

The config file is accurate and the lsusb command shows them both:

Bus 001 Device 005: ID 0079:0006 DragonRise Inc. Generic USB Joystick
Bus 001 Device 004: ID 0079:0006 DragonRise Inc. Generic USB Joystick

My config file is there too:

/opt/retropie/configs/all/retroarch-joypads

DragonRise Inc. Generic USB Joystick .cfg

input_device = "DragonRise Inc. Generic USB Joystick "
input_driver = "udev"
input_l_btn = "2"
input_load_state_btn = "2"
input_start_btn = "8"
input_exit_emulator_btn = "8"
input_up_axis = "-3"
input_a_btn = "5"
input_b_btn = "4"
input_reset_btn = "4"
input_down_axis = "+3"
input_r_btn = "6"
input_save_state_btn = "6"
input_r2_btn = "7"
input_right_axis = "+0"
input_state_slot_increase_axis = "+0"
input_x_btn = "1"
input_menu_toggle_btn = "1"
input_select_btn = "9"
input_enable_hotkey_btn = "9"
input_y_btn = "0"
input_left_axis = "-0"
input_state_slot_decrease_axis = "-0"
input_l2_btn = "3"

Any thoughts?