Reply To: ControlBlock unresponsive, thumbnail of rainbow in screen

[petrockblog]

P1 and P1 share the same Ground, so that is perfectly ok. My first guess is that the service „SNESDev“ is running in the background – it is the driver for the RetroPie GPIO Adapter and (unfortunately) uses some of the GPIO pins that the control block service is also using.
You can check if the service is installed with the command “service —status-all“.

So that might interfere with each other. You can uninstall the SNESDev service, e.g., either with the RetroPie-Setup Script, with the makefile that comes with the SNESDev-Rpi repository (https://github.com/petrockblog/SNESDev-RPi/blob/master/README.md#uninstalling-snesdev-service), or – if you are familiar with the command line and Linux – directly from the console.