@bollwerk I have the same problem, I'm trying to run raspbian on pi boy. At first I was stuck on LCL screen, but after adding mzdpi6.dtbo + config.txt of original pi boy sd card, the screen is no more stuck to lcl but it has vertical colored lines. I don't see other things, only these lines.

Have you an idea for that?

PS : if you wonder why I do that it's because I bought pi boy only for using little piggy tracker, a free program for make music with gamepad or buttons. And the retropie which is in my original sd card has problems, each time I change something in the sd card (using sd usb adaptor to linux computer), emulationstation doesn't start for a while (so i'm stuck on black screen, and it sometimes start again completly randomly...)
So i'm searching something more stable and I already know how to boot directly on little piggy tracker it is working on an other raspberry pi

Thank's