senkun
Participant
Post count: 35

I’m not sure why I had (similar) controller issues with dreamcast running retropie 3.6 on my Pi 2

but when I got my new Pi 3, only thing I had to do was set up my controller via the start up input configuration prompt, and all my buttons were perfectly mapped for dreamcast this time.

as a last resort setup your controller input again?

rm /home/pi/.emulationstation/es_input.cfg
F4 exit emulationstation
(re-)start emulationetation

the configuration prompt will appear again.