NetBSD 1.0 runs down battery

[donn]

I don't expect the cable knows anything! It's just wires and terminals. I don't know right off hand why it wouldn't have a direct power connection, like the AC adapter power supply that supplies the same 5V.

[KC9UDX]

I don't expect the cable knows anything!  It's just wires and terminals.  I don't know right off hand why it wouldn't have a direct power connection, like the AC adapter power supply that supplies the same 5V.

Some cables actually have chips in the plug ends.  USB-C charging is capable of negotiating charge rates, and that must happen (if it does) in the cable or the wall wart that the cable plugs in to.  The PBP does *not* negotiate USB-C charging rates in hardware.  I don't know if Linux might tell a smart charger plugged in to USB to turn on.  But such a device, if that's what's happening, should generate a message when NetBSD does or doesn't recognise it, I expect.

[donn]

Ah, I see written on the AC adapter to USB A, DC 5.0V=3A / DC 9V=2A / DC 12V=1.5A

[KC9UDX]

Just to be clear, that feature does greatly speed up charging on devices* that support it, but the PBP does not support it. Even if Linux is negotiating with the adaptor somehow, there's no actual benefit (other than maybe a power supply that needs to be commanded to turn on, such as what might be happening above).

*not in that case, as the current is lower at higher voltages, so no power gain