loujez@loujez
Thank you for your answer. Yes i start from emulationstation and i have tried 2 other pre-built image of MLP. The issues are the same on each image. I think i'm gonna try an install on recalbox in order to see if my arcade control panel is ok. I have to be sure that there is no ground probleme on it. I will give a feedback after the job is done.
Regarding to usb zero delay device, i find it very interesting. If i can't manage to solved my problems maybe i will follow your advice and buy one of them.
Thank you again. I will update my situation soon ?