I have an Acekard 2i (HW-81) N2DSXL on 11.5, a DSi XL (where the Acekard boots normally with the most recent update) and a magnet. Putting the N2DSXL manually in sleep-mode works.
When i plug the Acekard into my N2DS and start it, it says "Please turn off your device blablabla".
So i need to...