Just for the curious I want to share a bit background on this "dead button" issue.
I get the VoCore2 SOCs which are the heart of the MB PRO2 from a developer in China. In order to reduce my setup effort, they are pre-flashing the chips with my firmware before delivery to me for building up the system. That worked fine over the years. Lately, they upgraded the VoCore2 from 16 MB flash to 32 MB flash. So I had to touch the firmware again for the newer batch of SOCs to adapt to the larger flash size. Unfortunately, this new FW did loose the DTS definitions for the front button for reasons I still don't fully understand. It was clearly my fault, nothing to blame in China. I tested the new firmware but did not test the button operation. Again my fault.
A few days ago I got notice from a MB PRO2 user that the button on his PRO2 is not working. I drilled down into the issue and had to learn that it is not a hardware issue but a firmware flaw.
With the options explained in this thread you can fix it rather simple, in case you are impacted. Unfortunatly, you need physical access to the PRO2, a remote flashing is not possible.
Sorry for any inconvenience this fault might raise on your side. Best thing I could do in this situation is to offer a fix fast and as easy to do as possible.
