@mitu I'm not sure how to describe it. I've tried 3 different versions of Ubuntu and Pop OS and they all do the same thing after installing RetroPie. It will crash once when starting for the first time then work fine. The 8bitdo buttons don't program correctly the first time but will all map the second time. Then after I run a rom it stops recognizing the 8bitdo or it won't even load the rom and just locks up the system. The bluetooth stops responding on the OS desktop as well. I'll try to look into the 8bitdo firmware and see if that is an issue. I'm at a loss at this point.