USB power in standby

Discussion in 'Microsoft Surface Pro 3' started by Wayne Orwig, Feb 21, 2019.

  1. Wayne Orwig

    Wayne Orwig Active Member

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    I have used the USB port on my Pro 3 to charge my phone forever. I travel with a cheap after market charger, that does not have a USB port. My phone charged just fine from the port, even when the Pro 3 was asleep. It would not charge of course in hibernate, as expected.
    Starting about two weeks ago, my phone now only charges, when the Pro 3 is awake. When asleep, the phone shows that it is charging, but it actually isn't. Or it is very very slowly. But the hardware has no trouble charging the phone when awake. A have also tried other cables.

    I have looked all over for some type of setting, maybe a power saver for when asleep.

    Anyone have any thoughts on where to look?
     
  2. Wayne Orwig

    Wayne Orwig Active Member

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    Well, I'm pretty sure this is not a Pro 3 issue, but a phone issue. Oddly.
    I have a USB tester. The USB port data lines go to 2.9V and 0V, and the phone stops charging. So it looks like a phone issue. The 5V DC voltage is there, but the phone stops charging.
     

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