Spurious headphone detection interrupts
#21
A few extra interrupts here and there for this (causing minor polling) aren't objectionable in my opinion. But I agree that all of this is strange. I didn't check with music playing. But with no audio, detection is always 1 interrupt plugging in, 1 unplugging. If I get a chance I'll have to check with audio.

I don't see either, how detection even works. I can hardly believe that the GPIO input would work reliably with audio or no audio. The only thing that makes sense to me is either a DC bias, or an ultrasonic background signal, both of which are very problematic. Based on what you're reporting though, DC bias whenever there's no audio seems plausible, though irresponsible!
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RE: Spurious headphone detection interrupts - by KC9UDX - 01-08-2021, 08:23 AM

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