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The New Coffee Room

  1. TNCR
  2. General Discussion
  3. USB Hub question

USB Hub question

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  • George KG Offline
    George KG Offline
    George K
    wrote on last edited by
    #1

    When I got my last Mac, I bought a USB-C type hub for my peripherals. It's this guy.

    Screen Shot 2022-09-07 at 8.40.54 AM.png

    The USB-C cable at the top is plugged into my Mac. The HDMI port is not being used. On the right side, (with the SD card slots) I have a USB dongle for my wireless keyboard plugged in, and nothing else.

    On the other side, I have my two printers plugged in, and they work fine. Also, where it says "USB-C PD Input" I have it plugged into my UPS supply which has two USB ports - one of which I use for charging power bricks, etc. The other, as I said, is connected to the hub.

    When I plug my iPad into the hub, it does not charge, however, I can sync it to my Mac. When I plug it into a standard USB-A type hub, it's fine - charges and syncs.

    Any thoughts?

    My guess is that the USB port on the APC is not supplying enough power to charge the iPad. Anything else it could be?

    "Now look here, you Baltic gas passer... " - Mik, 6/14/08

    The saying, "Lite is just one damn thing after another," is a gross understatement. The damn things overlap.

    KlausK 1 Reply Last reply
    • markM Offline
      markM Offline
      mark
      wrote on last edited by
      #2

      The power cord is USB? Most likely, there is not enough power coming from the source.

      1 Reply Last reply
      • George KG George K

        When I got my last Mac, I bought a USB-C type hub for my peripherals. It's this guy.

        Screen Shot 2022-09-07 at 8.40.54 AM.png

        The USB-C cable at the top is plugged into my Mac. The HDMI port is not being used. On the right side, (with the SD card slots) I have a USB dongle for my wireless keyboard plugged in, and nothing else.

        On the other side, I have my two printers plugged in, and they work fine. Also, where it says "USB-C PD Input" I have it plugged into my UPS supply which has two USB ports - one of which I use for charging power bricks, etc. The other, as I said, is connected to the hub.

        When I plug my iPad into the hub, it does not charge, however, I can sync it to my Mac. When I plug it into a standard USB-A type hub, it's fine - charges and syncs.

        Any thoughts?

        My guess is that the USB port on the APC is not supplying enough power to charge the iPad. Anything else it could be?

        KlausK Offline
        KlausK Offline
        Klaus
        wrote on last edited by
        #3

        @George-K said in USB Hub question:

        When I plug my iPad into the hub, it does not charge, however, I can sync it to my Mac. When I plug it into a standard USB-A type hub, it's fine - charges and syncs.

        You mean when you plug it into a USB-C port, it does not charge but it does when you use a USB-A port?

        1 Reply Last reply
        • AxtremusA Offline
          AxtremusA Offline
          Axtremus
          wrote on last edited by
          #4

          USB-A is simpler and has been around much longer. USB-C uses a more complicated process to determine how much power to supply and which device should be supplying the power. It’s more costly to implement all of USB-C’s power delivery functions correctly, so some vendors just don’t do it or not doing it correctly, the result of which is that you sometimes get USB-C ports that don’t charge as expected. All this will get better over time, but for now I still hang on to my USB-A chargers.

          1 Reply Last reply
          • George KG Offline
            George KG Offline
            George K
            wrote on last edited by
            #5

            @Klaus said in USB Hub question:

            @George-K said in USB Hub question:

            When I plug my iPad into the hub, it does not charge, however, I can sync it to my Mac. When I plug it into a standard USB-A type hub, it's fine - charges and syncs.

            You mean when you plug it into a USB-C port, it does not charge but it does when you use a USB-A port?

            Not quite. I have a USB-A hub. And it charges and syncs fine with that. But when I plug it into the USB-A port on this fancy-schamcy hub, it doesn't.

            "Now look here, you Baltic gas passer... " - Mik, 6/14/08

            The saying, "Lite is just one damn thing after another," is a gross understatement. The damn things overlap.

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