Bootup failure


When I try to connect a sensor board to the Dragonboard using the 2 GPIOs, a black screen full of the error sysrq: SysRq : HELP : loglevel(0-9) reboot (b) crash(c)… appears.
Then my linux won’t start.
What can be the reason for this? I would like to read the GPIO data but apparently it crashes everything then?

Hi @greenh,

Are you using breadboard and trying to connect GPIO on LS connectors?
It looks like you are having kernel error message.

There are several resources about using GPIO on 96Boards.