Yea. Those 12 secs are the force shut down. And you can do it from RCM and horizon too. Just hold power button for 12+ seconds.
i tried this but sadly it still kept autorcm for me, because the battery drained as if it was on the entire time.
i tried it from both switch interface being on and from tx os boot menu, held power for 20+ second.
i wanted to boot it off for a while since i constantly keep it in sleep mode.
but then again i dont mind autorcm at all because i don't want to keep using the tin foil method (and even if i had a jig, i wouldn't want to keep rely on that either.)
best is just to keep autorcm enabled. (while it's in sleep mode there are zero battery issues.)
only if you power it off and think it's off while it's actually on that's why it drains the battery (it's literally on when you have autorcm enabled).
and the findings in that thread is that it doesn't work !!!! It boots back in to RCM after a while after doing that when using Autorcm. The only way people found it it works on that thread is letting it boot in to RCM and then doing the manually force shutdown from there. Doing it from horizon doesn't work !!! It goes back in to RCM after a while when doing it that way. The general gist of it, want to turn of your switch while using autorcm is doing it from RCM mode and if you don't want to do it like that then don't use autorcm
oh now i get it..
so after we power it off from horizon, then we think it's off but it's in autorcm, can we THEN hold power again for 10+sec and it'll then rly power off?
i haven't tried this!
but would i have to use jig/foil after doing that full power off?