lr-mame2010 controller issues

[SuperDannyG]

Hi Guys,

I was hoping someone would be able to help.

I'm trying to setup the lr-mame2010 controls, but I'm hitting an issue whereby the retroarch.cfg is ignored and Mame won't let me config anything other than player 1.

I'm using:
pi400
retropie 4.7.1
keyboard (setup with Ultimarc Ultimate)

Player 1 seems to work fine.

But when I use player 2, none of the buttons are mapped to retroarch.cfg (for example, in Street Fighter if I press button 2, then player 1 will do a kick and player 2 will do a punch, which are 2 separate buttons). Very weird.

This is my keyboard setup (in case it helps):

input_player1_a = "s"
input_player1_b = "a"
input_player1_y = "z"
input_player1_x = "x"
input_player1_start = "q"
input_player1_select = "t"
input_player1_l = "c"
input_player1_r = "d"
input_player1_left = "left"
input_player1_right = "right"
input_player1_up = "up"
input_player1_down = "down"
input_player1_l2 = "f"
# input_player1_r2 =
# input_player1_l3 =
# input_player1_r3 =

input_player2_a = "k"
input_player2_b = "j"
input_player2_y = "o"
input_player2_x = "p"
input_player2_start = "w"
input_player2_select = "y"
input_player2_l = "m"
input_player2_r = "l"
input_player2_left = "h"
input_player2_right = "n"
input_player2_up = "g"
input_player2_down = "b"
input_player2_l2 = "e"

input_player3_a = "pagedown"
input_player3_b = "pageup"
input_player3_y = "rightbracket"
input_player3_x = "minus"
input_player3_start = "r"
input_player3_select = "i"
input_player3_left = "home"
input_player3_right = "end"
input_player3_up = "insert"
input_player3_down = "del"

input_player4_a = "num9"
input_player4_b = "num7"
input_player4_y = "num5"
input_player4_x = "num1"
input_player4_start = "leftbracket"
input_player4_select = "u"
input_player4_left = "num4"
input_player4_right = "num6"
input_player4_up = "num8"
input_player4_down = "num2"

Is there a solution in getting (4 player) lr-mame2010 working with retropie?

I see another user has the same issue here https://retropie.org.uk/forum/topic/30855/lr-mame2010-multiplayer-control-setup-issues?_=1638112965767

Many thanks!