Latest Duo Focal still not booting.


sgjava
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Armbian_21.05.1_Nanopiduo_focal_current_5.10.34.img boots (updating via apt upgrade also causes it not to boot any more)
Armbian_21.08.1_Nanopiduo_focal_current_5.10.60.img does not

 

When I examine the SD card it hasn't expended from image (makes sense since the heartbeat never starts).

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@WernerOK, I finally figured this out and it's not my wiring job :) What's happening is the Duo uses DRX pin (debug receive) for PWM, so if I wire up a LED it will not boot. If I remove that wire it will boot up. After it boots I can connect wire and it will work as expected, so something changed in Armbian_21.08.1_Nanopiduo_focal_current_5.10.60.img. I suspect that no one noticed this unless they were doing hardware PWM, I guess I need to disable serial console?

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