USB C is not compatible with iPhone 15 / Pro / Pro Max

I can report that this also happened in the BIOS setup screen so it’s not OS related and OS might not be able to get the underlying EC firmware log.

If there’s any way to diagnose the issue other than using PD protocol analyzer, I’d like to help.

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Exactly.

@voltagex @mwei are the two of you on AMD or Intel perchance?

I’m on the AMD (7840U), and I don’t have the intel one to test.