Failed to start Load Kernel Modules

SolidHP

My setup as follows:

Pi Model or other hardware: RP 3B+
Power Supply used: Pi power supply
RetroPie Version Used 4.5.1
Built From: Pre made SD Image on RetroPie website
USB Devices connected: USB keyboard + Ultimarc I-PAC 2
Controller used: 2 Player arcade setup (with six buttons and 1 joystick per player)

During the boot up, the prompt shows red "Failed to start Load Kernel Modules" warning message but everything is working perfectly. Is there a way to solve this Kernel issue or get rid off the warning?

mitu

@SolidHP It depends on what kernel module failed to load. Reboot, then get the system's log with dmesg, then post the output on pastebin.com.
Did you install any of the driver packages included in RetroPie ?

SolidHP

@mitu <script src="https://pastebin.com/embed_js/FMUB3Yc1"></script>

mitu

You have installed the mkarcadejoystick and it is that module that fails to load:

...
Sep 18 10:24:10 retropie systemd-modules-load[86]: Failed to find module 'mk_arcade_joystick_rpi'
...

The module will not load without configuration - it needs some parameters to know how to map the GPIO pins inputs to joystick movements and buttons.

Unless you have your controller wired to the GPIO pins of the Raspberry Pi, you don't need this driver and you can safely uninstall it.

EDIT: hm, the module might be uninstalled, but still configured to load. Check the /etc/modules file and see if it's still present there and if is, remove it (erase the line with mk_arcade_joystick_rpi).

SolidHP

@mitu I have located the file with below content:

***# /etc/modules: kernel modules to load at boot time.

This file contains the names of kernel modules that should be loaded

at boot time, one per line. Lines beginning with "#" are ignored.

uinput
mk_arcade_joystick_rpi***

I tried to erase the line "mk_arcade_joystick_rpi" and save the file, a window popped out saying I do not have the permission and I cannot save the change...

mitu

@SolidHP You need to be root to be able to edit the file. Use nano from the command line to edit the file

sudo nano /etc/modules

SolidHP

@mitu You are simply awesome! The warning message is gone now, many thanks mitu!!