Like I said in the first post, changing to a different pin would be painful.
Yes, I understand GPIO2 is used for I2C (that's why I said GPIO2/SDA1). But, I'm not using I2C.
Are you saying the gpio-poweroff overlay not work for this pin? Or, just suggesting I try a different pin as an experiment.
If the latter, good suggestion and I'll do so.
Also, I AM using the I2S pins for a DAC, but those don't include GPIO2. I tried commenting the dtoveraly for the DAC in /boot/config.txt, but it made no difference wrt the pin going high at shutdown:
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