@mrsoczi We don't offer support for 3rd party images - https://retropie.org.uk/forum/topic/3/read-this-first.

For wireless controllers, take a look at the Controllers section in the Docs, you can use one of the PS3/PS4 controllers, an Xbox controller, 8Bit do controllers, etc.

Ok... I think I know what's happening, and If I'm correct I'm a completly dumbass xD
It seems that key taps are recognized and considered even in loading screen. With gamepad in hand (xbox 360), I usually tap A button repeatedly (an impatient one here...). It happens that the first emu in menu is the amiga one, and the first entry in Amiga's rooms is UAE4ALL, so, that's it. It's my "A" taps in loading screen that launch uae4all when screen becomes operative.
Yep... totally dumbass xD

Anyway, if I'm not a dumbass after all and the issue happens again (without "A" tapping :-P ) I'll let you know.
Thanks and regards!

haha, you would be suprised, as a kid we enjoyed listening to the music and loking at the splash screen while it loaded, I loaded one game up the other day, and the splash screen actually brought back vivid memories that I had fully forgotten up till that point.

Sorry :)

I was a little inaccurate formulating the question!
In fact I think that any that has wanted in the past to configure a gamepad on uae4arm has encountered a similar problem...

Pi Model: 2+
RetroPie Version Used: 4.1 downloaded from the website
USB Devices connected: Generic usb keyboard
Controller used: FC30 8bitdo

I saw another thread with a similar problem.

Unfortunatelly, after a lot of trying to replace uae4arm binary, it crashed whatever I pass the curson on input configuration tab, inside uae4arm.

Someone has some advice to configure a gamepad/keyboard on this emulator?

@njt1982 Look here and also some of my post.

guide-advanced-controller-mappings

This is what you probably are looking for.
Sadly i have not been able to get a system wide configuration working but im now at emulator specific configuration.

Any news on this? Same problem here. Any other controller that is working better?

Many thanks for your advice!