A proper way to wake up from suspend (VIM1)?

Pls advise, what is a good way to wake up VIM1 using Ubuntu from suspend? Is it possible via GPIO as well?

I know I could press Power button shortly while suspended, but this is not a good way

  • I do not want to press any button, there is a discrete signal that should do the wake-up
  • this signal may sometimes arrive while already in normal mode. But if the Power button is pressed in normal mode, the result is unwanted shutdown.

It would be perfect if one of the GPIO pins could be defined for wake-up function (and wake up only, nothing else).

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