Player 2 on N64 with IPAC2 - joypads

[winterelf]

Hi,
I have built an arcade console using IPAC2 with retropie installed on my rpi-3.
The IPAC2 is configured to a joystick mode and not keyboard.
I configured only 1 player using EmulationStation and it works perfect with all lr- based emulation (probably because of the autoconfig). In order to configure player 2 I used the retroarch menu in game, and this also works perfectly (for each console).

Now the issue:
When I am running n64 game under lr-mupen64plus and configure player 2, it works perfect. but lots of games works better on mupen64plus-gles2rise-highres, so I configured them to use mupen64plus-gles2rise-highres, when I check player 1, it works perfect, without configuring anything, but player 2 is the problem, so I need to configure it manually:
To configure it, I follow this link to configure my keys https://github.com/RetroPie/RetroPie-Setup/wiki/Nintendo-64#controls
Edit:
Player 1 I didn't touch, because it is working out of the box somehow (probably ES made it work using autoconfig) , but player 2 is the issue, it still doesn't seems to work after edditing themupen64plus.cfg fike , joystick + buttons not responding.
I ended up trying lots of shots in the dark, seems like player 2 buttons + joystick are completely ignored when running non lr- emulation of n64.

here is my controllers info (player 1 and 2, I edited player 2) in file /opt/retropie/configs/n64/mupen64plus.cfg

[Input-SDL-Control1]

# Mupen64Plus SDL Input Plugin config parameter version number.  Please don't change this version number.
version = 2
# Controller configuration mode: 0=Fully Manual, 1=Auto with named SDL Device, 2=Fully automatic
mode = 2
# Specifies which joystick is bound to this controller: -1=No joystick, 0 or more= SDL Joystick number
device = 0
# SDL joystick name (or Keyboard)
name = "Ultimarc I-PAC 2"
# Specifies whether this controller is 'plugged in' to the simulated N64
plugged = True
# Specifies which type of expansion pak is in the controller: 1=None, 2=Mem pak, 4=Transfer pak, 5=Rumble pak
plugin = "2"
# If True, then mouse buttons may be used with this controller
mouse = False
# Scaling factor for mouse movements.  For X, Y axes.
MouseSensitivity = "2.00,2.00"
# The minimum absolute value of the SDL analog joystick axis to move the N64 controller axis value from 0.  For X, Y axes.
AnalogDeadzone = "4096,4096"
# An absolute value of the SDL joystick axis >= AnalogPeak will saturate the N64 controller axis value (at 80).  For X, Y axes. For each axis, this must be greater than the corresponding AnalogDeadzone value
AnalogPeak = "32768,32768"
# Digital button configuration mappings
DPad R = ""axis(0+)""
DPad L = ""axis(0-)""
DPad D = ""axis(1+)""
DPad U = ""axis(1-)""
Start = "button(8)"
Z Trig = "button(7)"
B Button = "button(1)"
A Button = "button(0)"
C Button R = ""axis(3+)""
C Button L = ""axis(3-)""
C Button D = "button(2)"
C Button U = "button(3)"
R Trig = "button(4)"
L Trig = "button(5)"
Mempak switch = ""
Rumblepak switch = ""
# Analog axis configuration mappings
X Axis = "axis(0-, 0+)"
Y Axis = "axis(1-, 1+)"


[Input-SDL-Control2]

# Mupen64Plus SDL Input Plugin config parameter version number.  Please don't change this version number.
version = 2
# Controller configuration mode: 0=Fully Manual, 1=Auto with named SDL Device, 2=Fully automatic
mode = 2
# Specifies which joystick is bound to this controller: -1=No joystick, 0 or more= SDL Joystick number
device = 1
# SDL joystick name (or Keyboard)
name = "Ultimarc I-PAC 2"
# Specifies whether this controller is 'plugged in' to the simulated N64
plugged = True
# Specifies which type of expansion pak is in the controller: 1=None, 2=Mem pak, 4=Transfer pak, 5=Rumble pak
plugin = "2"
# If True, then mouse buttons may be used with this controller
mouse = False
# Scaling factor for mouse movements.  For X, Y axes.
MouseSensitivity = "2.00,2.00"
# The minimum absolute value of the SDL analog joystick axis to move the N64 controller axis value from 0.  For X, Y axes.
AnalogDeadzone = "4096,4096"
# An absolute value of the SDL joystick axis >= AnalogPeak will saturate the N64 controller axis value (at 80).  For X, Y axes. For each axis, this must be greater than the corresponding AnalogDeadzone value
AnalogPeak = "32768,32768"
# Digital button configuration mappings
DPad R = "axis(2+)"
DPad L = "axis(2-)"
DPad D = "axis(1+)"
DPad U = "axis(1-)"
Start = "button(8)"
Z Trig = "button(9)"
B Button = "button(14)"
A Button = "button(15)"
C Button R = ""button(6)""
C Button L = ""button(13)""
C Button D = "button(11)"
C Button U = "button(7)"
R Trig = "button(12)"
L Trig = "button(10)"
Mempak switch = ""
Rumblepak switch = ""
# Analog axis configuration mappings
X Axis = "axis(2-, 2+)"
Y Axis = "axis(1-, 1+)"