How do you revert the firmware on a non-booting Raspberry Pi 3?
The camera not was working under Ubuntu 16, despite it running the most recent firmware. So I took some advice and tried installing older firmware, but now it won't boot and all I get is the Rainbow Screen Of Death.
However, I previously installed Raspbian on a different SD card, and if I swap that in, it boots fine.
Is there anything I can do with the Ubuntu SD card to fix it, so it boots? I mounted it on my laptop, and saw there was a
/boot.bak folder. I tried copying that over to
/boot, but it still won't boot. Is there anything else I can do or is that SD card hosed?