Is this really so?
"Raspberry Pi 4 won't work with some power cables due to its USB-C design flaw
"Did Raspberry Pi Foundation fail to test Raspberry Pi 4 properly? Either way, one expert says new flagship is not USB-C compliant and must be fixed."
Sounds a bit of a blunder if it's true.
Yes. Very basic error: they used 1 resistor to pull down two lines. That changes the total resistance and it no longer fully complies with the usb-c spec. Smart cables (or adapters using them) now recognise it as an audio device and won't charge. Apple power adapters and their cables notably. Simply use any dumb cable and they will work. Ref:
Upton has promised a board revision:
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