We are experimenting a weird effect on our Chipworkx dev board (1.5 release).
In our system, we have a Chipworkx board connected to USB device (i.e. chipworkx is usb host) and a SD card inserted in its slot.
In such configuration, when we reboot board during develop/debug cycle everything is fine.
When we try to power-up the system via external power supply nothing happens: the display turns on but instead of showing booting splash (i.e. tinybooter and tinyclr messages in green on black background) it shows a blank, white, screen, and boot doesn’t go on.
Resetting or power-cycling the board has no effect.
To restart the board, we have either to disconnect USB cable (the one that connect chipworkx as USB host by its USB device) or extracting the SD card from its socket before reconnecting power-supply.
We tried with several power supplies (different voltages and current level capabilities) with same result.