@AlexMurphy said in Pocket PiGRRL image won't boot:

@basteluwe You are asking RetroPie why their image works and a third party modified image doesn't? You would really need to address your query to adafruit whose image it is.

No, I'm not asking Retropie! I'm asking experianced guys here at this forum for advice!
But forget it. I used the basic package and did the changes manually myself. So, problem solved (for me at least).