If the kernel won't boot won'tIn regards to getting UART through the headphone jack..... I see that with a Nexus 4 it uses a DEBUGGER_TRIGGER which operates actually through the 3.5mm mic input. It senses with mic input and then switches headphone out from audio to UART data.
I thought it was confirmed that our original Nexus 7 does NOT have a TRRS jack, meaning you cannot plug a mic'd headset into the 3.5mm jack and use the mic. Therefore.....you cannot trigger the UART either in such a way. Maybe a kernel could be built where the UART was hard coded.
Am I wrong? (I want to be wrong)
Uart not work if it was hard coded?
I was thinking
Maybe you can tell the kernel to do a logcat the vary first thing
Before it does any thing else