Ok, thanks! Seems as if you are correct! I am now using the following 3 gpio's: 2, 3, 18. Seems to be the combination that works for me. Would be nice if we could get some sort of definitive doc that might let us know whats up. Would also be nice if the docs were consistent.
@Igor-Silenock I have observed the same behavior with several Omegas2+. That is incomplete, halted boots when powered by 3.3V, then a successful boot when the power was increased to 3.4V. I did wonder if the digital meter on my bench power supply is accurate ... my VOM says it is, but in both cases this is measure of the least significant digit.
Put a 2200uF 6V electrolytic capacitor at the output end of the voltage regulator.
Also, always use thicker power supply wires to alleviate the situation a bit.
It's the brown out condition where the supply voltage drop in a very brief transit when the Omega 2 board demands more power. The Omega 2 board along really needs a stable 300mA power supply for a sustained period of time.
Make sure that the system is fully operative by using a delay as suggested by @fossette
As is mentioned in the referenced post, make sure the program you want to run at boot terminates in a timely manner and doesn't end up blocking the start up process - e.g. run it in the background
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